Knuckles The Echidna (Mobius-777) Pre-CMD

Knuckles The Echidna
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Pre-CMD
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* Knuckles (Modern)
* Classic Knuckles

Sensing energy

* Leadership skills
* Driving skills
* Harnessing Chaos Emerald energy
* Hyper Mode initiation
	+ Super transformation
	+ Hyper Knuckles transformation

Double Punch

* Drill Claw
* Enrage
* Fire Combination
* Fire Dunk
* Fireball Jump
* Glide
* Glinding Knuckles Attack
* Gravity Control
* Gravity Dive

Grind Step

* Grinder Attack
* Ground Shaker
* Guard
* Hammer Attack
* Hammer Punch
* Hard Line (requires Shadow, Chronos, and Shade)
* Homing Attack
* Jump Dash
* Kick Dash
* Kn. Air Hook
* Kn. Straight
* Knuckle Slam
* Knuckles Chop
* Knuckles Dash
* Knuckles Express (requires Shadow)
* Knuckles Guard
* Knuckles Heal
* Knuckles Jump
* Knuckles Punch
* Knuckles Run
* Knuckles Sandwich (requires Sonic and Amy)
* Knuckles Style
* Knuckles Upper
* Major Eruption
* Maximum Heat Knuckles Attack
* Megaton Hook
* Meteor Crush
* Meteor Punch
* Mole Bomb
* Power Flash
* Punch Attack

Quake Punch

* Revolver Slam (requires Sonic)
* Rival Takedown
* Rock Free Fall
* Screwdriver
* Skim Boost
* Slide
* Slingshot
* Solid Knuckle
* Sonic Overdrive (requires Sonic and Tails)
* Spin Attack
* Spin Dash
* Spin Jump
* Spinning Back punch
* Spiral Attack
* Spiral Upper
* Strength Support 3
* Swim
* Tag Action
* Team Ultimate
* Thunder Arrow
* Triangle Dive
* Trick Action
* Trounce Support
* Uppercut
* Volcanic Dunk

Knuckles the Echidna is an anthropomorphic echidna and the current guardian of the Master Emerald, a powerful ancient gemstone which is kept on Angel Island. Guarding it is his solemn duty to protect from anyone seeking to abuse it, as well as the sole surviving descendant of the echidna race from the Knuckles Clan. Known for his powerful and wild nature, his dominant traits are his super strength and the two spike-like knuckles on each of his gloves, from which his name is derived from, and which he can dig and climb walls with.

## History of Knuckles The Echidna (Mobius-777)

### Past

Knuckles was born alone and raised on Angel Island as the last surviving member of the Knuckles Clan, a long-lost race of echidnas devoted to protecting the Master Emerald from being abused. Apparently, he had been charged with protecting the Master Emerald for as long as he can remember. However, Knuckles' own past was a mystery to him; he knew nothing of how he came to be, his ancestral roots, or even the details of the Master Emerald he was supposed to protect, and believed himself to be the last of his kind entirely. Despite this, he chose to spent his life as the Master Emerald's guardian, never questioning it. Knuckles knew as well from innate knowledge that his duty was his fate, and he was content with that.

For much of his life, Knuckles stayed close to the Master Emerald's shrine, steadfastly protecting it while having little to no contact with the outside world, becoming friends with all the animals and the nature itself on Angel Island.

### Sonic The Hedgehog 3 & Knuckles

Knuckles was on his usual patrol of the Floating Island's pillar, watching over the Master Emerald and the seven Chaos Emeralds. However, the Chaos Emeralds started to float and vibrate as tremors began. Then, in an ear-piercing crash and brilliant flash, Knuckles was knocked unconscious. When he regained consciousness, Knuckles found the altar partially destroyed and the Chaos Emeralds missing. Shocked, he investigated the island and discovered the Death Egg had crash-landed on the Floating Island, its impact having pushed the island into the sea. This sight made Knuckles recall a prophecy depicted on murals in Hidden Palace Zone that said that a dragon's egg would bring disaster to the island.

Over the next days, Knuckles patrolled the island while looking for the Chaos Emeralds. Eventually, he met a mysterious man, whom he tried to attack. However, the man, introducing himself as Dr. Ivo Robotnik, begged for mercy, telling Knuckles that he was a friendly scientist conducting research on the Death Egg and that two people, named Sonic and Tails, were disrupting his work and had come to steal the Chaos Emeralds. Due to his seclusion, Knuckles believed Robotnik and made it his goal to stop Sonic and Tails and keep them from the doctor, not realizing that he was actually being used by Robotnik to keep the duo at bay while he rebuilt the Death Egg.

When Sonic arrived on the island as Super Sonic with Tails, Knuckles pulled a cheap shot on Sonic that forced the Chaos Emeralds out of him, which Knuckles escaped with and hid away. As Sonic and Tails traveled across the Floating Island, Knuckles attempted to stop the duo in Angel Island Zone, Hydrocity Zone, Carnival Night Zone and Launch Base Zone with his traps. As Sonic tried to board the Death Egg, Knuckles kept Sonic from getting close until tremors caused him to fall.

After the Death Egg crash-landed on the Floating Island again, Knuckles briefly visited Hidden Palace Zone through a Giant Ring in Mushroom Hill. After securing the hidden object, Knuckles disappeared into the forest.

As Sonic and Tails continued to explore the island, Knuckles opposed them with traps in Mushroom Hill Zone and Lava Reef Zone. However, as Sonic and Tails arrived in the Hidden Palace Zone, Knuckles faced Sonic in an epic showdown but lost. After his defeat, Knuckles heard an explosion at the Master Emerald's shrine and discovered that Robotnik was stealing the Master Emerald to power the Death Egg. Realizing he had been deceived, Knuckles tried to stop Robotnik, but was electrocuted as the doctor escaped. Befriending Sonic and Tails, Knuckles guided them to the Sky Sanctuary Zone from where they could board the Death Egg, though he was too exhausted to accompany them. Fortunately, Sonic and Tails returned with the Master Emerald to the Floating Island, and Knuckles watched as his new friends and allies left the island in the Tornado.

Days later, the peace on the Floating Island came to a halt when one of the Eggrobos, under orders from Mecha Sonic Mk. II, attacked Knuckles with a bomb as he was relaxing in the Mushroom Hill Zone. Through luck or toughness, Knuckles survived the explosion and set off to defeat the EggRobo. Knuckles proceeded to follow the Eggrobo to Sky Sanctuary Zone where it grabbed him with its Egg Mobile and brought it before Mecha Sonic, who had stolen the Master Emerald, threatening to make the Floating Island fall once more. However, Knuckles escaped the Egg Mobile before Mecha Sonic could kill him, resulting in the EggRobo's destruction. As Knuckles fought Mecha Sonic, the robot used the Master Emerald to go Super. Though Knuckles beat it, the fight caused their arena to crumble. Fortunately, Knuckles and the Master Emerald were rescued by Sonic in the Tornado, and the two returned to the Floating Island with the Master Emerald. Having saved the Floating Island again, Knuckles and Sonic departed ways once more.

### Knuckles' Chaoitx

A few months after the Angel Island incident, Knuckles noticed a new island had risen from the southern ocean as a result of tectonic activity simulated by the Master Emerald's presence, and was now rapidly flourishing due to the gem's pillar. Curious, Knuckles speculated it held the remains of the Knuckles Clan and that something there was amplifying the power of the Master Emerald's pillar. Duty-bound, Knuckles left to investigate the island. When he got there, Knuckles noticed that it had been converted into the Newtrogic High Zone by Dr. Robotnik who sought to synthesize Dark Rings to help him steal the Master Emerald. Knuckles soon found Robotnik and made him to flee with Metal Sonic as he was trapping Espio the Chameleon in his Combi Catcher. Knuckles then freed Espio, and they teamed up to free Robotnik's other captives and thwart the doctor's plans.

Together, Knuckles and Espio freed the captive Vector the Crocodile, Charmy Bee and Mighty the Armadillo, who also joined them. After that, Knuckles and his crew began securing the prestigious Chaos Rings while stopping Robotnik's usage of his Dark Rings on several occasions. When the time came for the final showdown, the Chaotix was attacked by Metal Sonic. During the ensuing battle, Knuckles and co. fell into another room where they were attacked by Metal Sonic Kai, Robotnik's final trump card. Regardless, Knuckles and the Chaotix still defeated him, thus restoring peace to the island.

### Sonic The Fighters

Knuckles had been entrusted to safeguard one of the Chaos Emeralds to keep Dr. Robotnik from abusing it. Eventually though, Knuckles met Sonic and Tails, who needed the Chaos Emeralds to power the Lunar Fox, a single-seat spaceship Sonic could use to reach and destroy the Death Egg II, a space station Robotnik was currently using to deploy robots to lay waste to the world with. Knuckles, however, argued that since the Lunar Fox only had one seat, then the one to go should be the strongest among them. Before Knuckles and Sonic could fight over the spot though, Tails got between them and convinced them to fight fair and squarely over the spot in the ring with the other Emerald guardians, and the one who could win against all the contestants got to ride the Lunar Fox. A fighting tournament was subsequently established.

At the end of the tournament, Sonic used the Chaos Emeralds to go to the Death Egg II and made it self-destruct moments after escaping it.

### *Sonic 3D Blast*

Knuckles joined Sonic and Tails on their trip to Flicky Island. Having heard legends that the Flickies on the island held the key to finding the Chaos Emeralds, the group journeyed to there to find these birds. When they got there, however, the island was in pandemonium because of Dr. Robotnik who had built a base on the island from where he turned the Flickies into Badniks and used them to search for the Chaos Emeralds on the island. As such, Knuckles worked together with Sonic and Tails to find the Chaos Emeralds, helping their hedgehog friend save the Flickies and defeat Robotnik.

### Sonic Blast

Knuckles teamed up with Sonic to stop Dr. Robotnik when the doctor planned to use the shattered pieces of a Chaos Emerald to fortify his Silver Castle. Knuckles' reasons for doing so was partially because he could not trust Sonic to accomplish this task alone, although he mostly just wanted to punish Dr. Robotnik. In the end, the heroes secured the Emeralds and destroyed Robotnik's fortress.

### Sonic R

Knuckles heard from an advertisement that the World Grand Prix, a racing competition to determine the fastest in the world, was about to take place. Hearing that Sonic was participating, Knuckles entered too, not willing to miss the chance to settle his score with Sonic. Sadly, Knuckles only wins one race, but Sonic told him that it was tie, but Knuckles was right he did win. Which, confuses the red echidna. Robotnik throws a hissy fit that he didn't win the race, and demands his minions to attack Super Sonic. Knuckles uses his Super form and destroys Metal Knuckles. Robotnik retreats back to his base, plotting his next big move.

### Sonic Mania

Sometime after Sonic R, Knuckles was relaxing on his island when he heard a loud noise. As it turned out, five Egg-Robos serving Dr. Eggman, called the Hard Boiled Heavies, had excavated the island in search of a mysterious gemstone called the Phantom Ruby. Knuckles prepared to fight them but the robots knocked him out, activating the ruby and transporting the echidna away. Knuckles ended up in Green Hill Zone, along with Sonic, Tails and the Egg-Robos. Having been upgraded by the Phantom Ruby, the Hard Boiled Heavies retreated with the ruby, leaving Knuckles and co. to chase them down.

The trio was eventually attacked by Dr. Eggman and his Death Egg Robot. Even so, they managed to defeat Eggman, causing him to fall into a hole. Following Eggman, Knuckles and his friends saw Eggman take the Phantom Ruby from the Hard Boiled Heavies, who had begun to disobey him. Once Eggman obtained the ruby, Knuckles, Sonic and Tails got sent to Chemical Plant Zone by the gem's power. Not set back by their displacement, Knuckles and his allies continued their pursuit of Eggman, occasionally clashing with the Hard Boiled Heavies and other foes along the way. Whenever they caught up to Eggman however, the doctor either gave them the slip or sent them away with the Phantom Ruby. During the adventure, Knuckles also kept the leader of the Hard Boiled Heavies, the Heavy King, from trying to steal the Master Emerald when the echidna got separated from his friends. Afterward, he caught up with his friends again.

Along the way, Knuckles, Sonic and Tails found out that Dr. Eggman had captured the Miracle Planet. There, Eggman and the Hard Boiled Heavies housed a new base of operations: the Titanic Monarch. Eventually, the trio made their way to the heart of the robotic area where they faced Eggman in his Phantom Egg mech and four of the newly upgraded Phantom Heavies. Despite the odds, Knuckles and co. managed to defeat Eggman, resulting in the breakdown of the Titanic Monarch. While Knuckles and Tails managed to escape the Miracle Planet, Sonic and Eggman were transported to the future. Soon after, The Miracle Planet was freed from its chain once again, and Knuckles and Tails smiled upon seeing a star constellation of Sonic appear in the sky as the planet vanished.

### Sonic Mania Plus

After Sonic made his return from his latest adventure in the Future, Knuckles teamed up with Sonic, Tails, Mighty and Ray to keep the Hard Boiled Heavies from harnessing the Phantom Ruby again.

The group was eventually attacked by Dr. Eggman and his Death Egg Robot. Even so, they managed to defeat Eggman, causing him to fall into a hole. Following Eggman, Knuckles and his friends saw Eggman take the Phantom Ruby from the Hard Boiled Heaves, who again refused to obey him. Once Eggman obtained the ruby, the heroes got sent to Chemical Plant Zone by the gem's power. Not set back by their displacement, the group continued their pursuit of Eggman, occasionally clashing with the Hard Boiled Heavies and other old foes along the way. Whenever they caught up to Eggman however, the doctor either gave them the slip or sent them away with the Phantom Ruby.

Eventually, Knuckles and his allies found out that Dr. Eggman had seized Miracle Planet once again, but was foiled with making further operations because of a cyan hedgehog. There, he and the Hard Boiled Heavies had rebuilt the Titanic Monarch. Eventually, the heroic group made their way to the heart of the rebuilt Titanic Monarch where they faced Eggman in his Phantom Egg mech and four of the recently re-upgraded Phantom Heavies. Despite the odds, Knuckles and his friends managed to defeat Eggman, resulting in the Phantom Ruby creating a rift that began devouring the Titanic Monarch. Assuming their Super States with the aid of the Chaos Emeralds. However, Knuckles and his group escaped the rift, where as Eggman got swallowed by it. Afterwards, the gang closed off their adventure with a trip to an ice cream parlor, only for the Heavy King to make an appearance and surprise them with a sundae.

### Sonic Adventure

Knuckles was falling asleep beside the Master Emerald at its altar while lamenting the story of his life, he awoke to find Chaos next to the shattered Master Emerald. Assuming Chaos broke the relic, Knuckles attacked it, but it blindsided him and escaped. With the Master Emerald gone, Angel Island fell into the sea. Knuckles thus began searching for the Master Emerald's scattered Emerald Shards, but after finding a few, he was pulled into the past Mystic Ruins in the eyes of Chronos by Tikal's spirit, when the Knuckles Clan still thrived, where he saw the female echidna trying to convince Chief Pachacamac to abandon his war efforts.

Back in the present, Knuckles spotted Dr. Robotnik and a shining object in the doctor's hands, which he believed to be an Emerald Shard but discovered it was a Chaos Emerald when he cornered him. The villain called in Chaos 1 and transformed it into Chaos 2, but the echidna still recognized it and beat it. Afterward, before leaving, Robotnik told Knuckles that Sonic was after the Emerald Shards as well, which filled Knuckles' mind with doubts. After finding more Emerald Shards, Knuckles found Sonic and Tails. Seeing something shining in Sonic's hands, Knuckles believed it was Emerald Shards, and attacked the duo until Sonic dropped them, and they were revealed to be Chaos Emeralds. Robotnik then showed up to nab the Emeralds, mocking Knuckles with how easy it was to trick him into assisting him steal the Emeralds, and gave them to Chaos 2, turning it into Chaos 4. After defeating Chaos 4, Knuckles left to find the remaining Emerald Shards while Sonic and Tails chased Robotnik's Egg Carrier.

Knuckles was soon after sent back to the past in the eyes of Chronos after finding more shards where he saw Tikal trying to convince Chaos to flee the Altar of Emerald along with the Chao. Finding himself back at the present-day altar, Knuckles tried restoring the Master Emerald, only to see it still missing a few pieces. From an image inside the Master Emerald, Knuckles saw the Egg Carrier and deduced it was there where the last Emerald Shards remained. Knuckles soon after stumbled upon E-102 Gamma and trailed the robot to the Egg Carrier where Knuckles found the remaining shards, only to be sent to the past again in the eyes of Chronos, this time to see the altar ablaze where he tried asking Tikal what was going on but was immediately sent back to the present. Back on the Egg Carrier, Knuckles briefly met Sonic as he was heading after Robotnik. As Knuckles wished Sonic well, the latter left the echidna to battle off Chaos 6. Knuckles subsequently defeated Chaos and got retrieved its six Chaos Emeralds before returning home with all the Emeralds and Emerald Shards where he restored the Master Emerald, allowing it to return Angel Island back to the sky.

Not long after, the Angel Island fell down again, and Knuckles decided to find Sonic to ask for advice, believing the Chaos Emeralds he brought back had something to do with it. Soon after, however, he discovered Robotnik and was ambushed by Chaos, who took his Chaos Emeralds. Later found by Sonic and Tails, Knuckles informed them of Chaos's return and that it would destroy the world using the Chaos Emeralds, before taking off himself to deal with the threat. Arriving in Station Square where Perfect Chaos was on a rampage, Knuckles found four of the now-drained Chaos Emeralds and brought them to Sonic while his other friends brought the remaining three, where he reluctantly agreed with Tails that Sonic could still harness the Chaos Emeralds' positive energy to stop Chaos.

After Super Sonic had defeated Perfect Chaos, Knuckles looked on with content as Chaos was returned to a peaceful creature once more and departed with Tikal.

### Sonic Shuffle

Knuckles, Sonic, Tails, and Amy were suddenly transported to the Temple of Light in Maginary world. There, they met Lumina Flowlight who had brought them here to help restore the Perfect Precioustone which had been shattered by Void and made their guardian, Illumina, disappear. With Void now posed to destroy Maginary world with the Precioustone gone, Knuckles agreed to help with the others. While finding the Precioustone and restoring the world affected by Void, Knuckles had a dream where he met Void. Knuckles and the others initially opposed Void but eventually saw that Void was lonely and sad which touched their hearts, and they soon saw that Void and Lumina were two halves of the same whole.

After having brought the Precioustones to the Temple of Light, Knuckles and the others returned there when Void went for the Perfect Precioustone again. There, Void's despair transformed him into a monster. Knuckles and the team defeated Void, but Lumina fell into despair as the Perfect Precioustone was not recovering. When Sonic found Void in the form of a dark gem, Knuckles helped get Lumina to accept Void by noting how negative feelings were needed for dreams to flourish. With Lumina's hope restored, Knuckles and the group saw her restoring the Precioustone, and Lumina and Void remerging back into Illumina. With Maginary world restored to an even better place, Knuckles and the gang received Illumina's gratitude before returning home.

### Sonic Adventure 2

Knuckles discovered the Master Emerald had been stolen by Rouge the Bat. Tracking her down to a desert, Knuckles had an ownership dispute with Rouge over the Emerald until it was stolen by Dr. Robotnik, who had tracked its signal. Rather than letting Eggman have it, Knuckles shattered the Master Emerald and scattered its Emerald Shards to prevent the theft. With Rouge berating him for his action, Knuckles began hunting down the shards before Rouge could get them. After gathering some shards on the way, Knuckles got lost inside the Aquatic Mine and ended up in Central City, where he met Tails and Amy, only for Amy to drag him into Sonic's latest adventure, where they were trying to stop Eggman from using the Eclipse Cannon to take over the Mobius.

Having located Eggman on Space Colony ARK, Knuckles led the group to Eggman's base, having seen both Eggman and Rouge enter it. Believing there was a space shuttle there that could take them to the ARK and destroy the Eclipse Cannon, Knuckles, and the team infiltrated the base, where Knuckles found the keys to the center at Sonic's choice, before having a fight with King Boom Boo. At the shuttle's launch pad, Knuckles and the others were ambushed by Eggman with the Egg Golem. While Sonic defeated the Egg Golem, Knuckles and the others got a space shuttle to take off in. While on route to Space Colony ARK, however, the shuttle hit a stray asteroid, causing the cargo bay to open and releasing all the Emerald Shards Knuckles had stored there. Panicking, Knuckles tried taking control of the shuttle, only to cause it to crash into the ARK. After landing, Knuckles left the group to find the lost shards.

After finding some shards, Knuckles met Rouge again and fought her to a stalemate. However, as Rouge lunged towards the Master Emerald, she tripped and began falling towards a lava pit, but Knuckles saved her life, only for Rouge to show ingratitude to him. Regardless, she returned the Emerald Shards she had found as thanks. After restoring the Master Emerald, Knuckles left with it, but not before swallowing his pride and apologizing to Rouge for hurting her. No sooner, Knuckles found Sonic appearing in front of him after he had escaped from a doomed capsule using Chaos Control with a fake Chaos Emerald, who told Knuckles to go help Tails and Amy as he left to destroy the Eclipse Cannon.

After the Eclipse Cannon had been stopped, Knuckles and Sonic met Rouge, who told them that the ARK was on a collision course with Mobius, although Knuckles thought by her appearance that she was still after the Master Emerald. Knuckles and the others then saw a recording of Gerald Robotnik announcing to the world that the ARK's impact would destroy the planet as his vengeance against humanity for the death of his granddaughter, Maria. Banding with Eggman, Knuckles and the group came up with the plan to use the Master Emerald to deactivate the seven Chaos Emeralds, which were powering the cannon's core, to stop the Space Colony's crash course. When Knuckles and Sonic made it to the core, they were attacked by the Biolizard, but Shadow arrived to distract it. Knuckles used the Master Emerald to stop the Chaos Emeralds, but the Biolizard warped outside and fused with the ARK, becoming the Finalhazard, to keep the ARK on its collision course. Knuckles then watched Sonic and Shadow use the Chaos Emeralds to transform into Super Sonic and Super Shadow before leaving to defeat the Finalhazard. He and the others advised the two through transmission lines.

After Super Sonic and Super Shadow beat the Finalhazard and brought the ARK warped into orbit, Knuckles saw Sonic return alone, informing them that Shadow had seemingly died. Knuckles then asked Rouge what she planned to do and was content to hear she considered giving up treasure hunting before they returned to Mobius.

### Sonic Advance

Knuckles joined forces with Sonic, Tails, and Amy to stop Dr. Eggman from obtaining the seven Chaos Emeralds. Over the course of their adventure, Knuckles and the others got the Chaos Emeralds first and chased the doctor to the X-Zone. After they defeated the Egg X, Knuckles, Tails, and Amy returned to Mobius while Super Sonic faced Eggman in a final confrontation on the moon. There, they awaited Sonic's return but grew confused when he did not show up. A few days later, though, Sonic finally returned.

### Sonic Advance 2

Knuckles was kidnapped alongside Tails by Dr. Eggman when the evil scientist attempted once more to create the Eggman Empire. After being captured, Knuckles was main controlled by Eggman into fighting Sonic.

In Sky Canyon, Knuckles intercepted Sonic and his allies in the Egg Saucer but was defeated. Realizing that he had been mind controlled, Knuckles tried to defend himself but was chided by Sonic. When Sonic then tried to leave, Knuckles joined him, wanting payback at Eggman.

After hunting down and seemingly beating Eggman, Knuckles, Sonic, Tails, Cream, and Cheese found Vanilla who had gone missing, only to see her being kidnapped by Eggman in his new mech. Knuckles then witnessed Sonic using the Chaos Emeralds to become Super Sonic and taking off to rescue Vanilla and stop Eggman. When Sonic returned with Vanilla, Knuckles congratulated Sonic for a job well done.

### Sonic Heroes

Knuckles and Tails received a letter from Dr. Eggman, who claimed to have created "the ultimate weapon" to conquer the world and challenged them to stop him within three days. Using the Tornado 2, Knuckles and Tails found Sonic and brought him the news. As Knuckles was confident they could handle it, he and Tails joined Sonic in stopping Eggman's scheme, officially forming Team Sonic.

Beginning their mission by tracking Dr. Eggman, Team Sonic found the doctor at Ocean Palace, where they were attacked by the Egg Hawk. Though the team defeated the machine, Eggman escaped. Knuckles and Team Sonic then followed Eggman to Grand Metropolis, where the team freed the city from Eggman's control and escaped from the Power Plant, before running into Team Rose, who they managed to give the slip.

Arriving in Casino Park, Knuckles was taken back by the place but was pushed on. As they got through the city, Eggman attacked them with his Robot Carnival, but Team Sonic defeated the horde. Following Eggman to Rail Canyon and only having until sunset, Knuckles and his team headed for Bullet Station and destroyed Eggman's base there. Team Sonic found Eggman in the Egg Albatross and destroy it. It was then, however, that Knuckles and the team discovered that the Eggman they had been chasing was a copy and that their challenge was to distract them while Eggman launched his Egg Fleet. As Sonic took off, Knuckles quickly followed him.

Following Eggman through the jungle, Team Sonic met Team Dark and saw Shadow was still alive. As an argument arose about who would take down Eggman, the two teams fought each other. After the battle, Team Sonic followed Eggman and Shadow to Hang Castle, where Knuckles teased Tails by saying that it could have been Shadow's ghost they saw. After infiltrating the castle and escaping Mystic Mansion, Team Sonic was attacked by Eggman's Robot Storm but defeated it.

After that, Team Sonic got to the Egg Fleet and went straight for the Final Fortress where they destroyed the colossal flagship's core. Team Sonic then found Eggman in his Egg Emperor and defeated him. After destroying much of the Egg Fleet, Knuckles teased Sonic with how he would have stood no chance without their help, but was surprised when Sonic agreed and thanked him and Tails. Knuckles and Tails then watched Sonic run away as Amy arrived.

Later, Team Sonic and the other teams saw the return of Metal Sonic, who had been staging the teams' adventures and impersonating Eggman so he could follow them and copy their data for a plan to conquer the world himself, as he transformed into Metal Madness. Seeing that the teams had collected all the Chaos Emeralds, the real Dr. Eggman came up with the plan of using them against Metal Sonic. When Sonic decided to face Metal Sonic alone, Knuckles insisted on going with him along with Tails. While Team Sonic charged the Chaos Emeralds, Team Rose, Dark, and Chaotix fought Metal Madness to buy them some time.

When Metal Madness transformed into Metal Overlord, Knuckles and Tails were given their own Super States by Sonic as he transformed into Super Sonic. The team then took off and defeated Metal Overlord. Back on the flagship, Knuckles watched Sonic leave, before chasing after Rouge once she said she would steal "someone else's treasure." Soon after, Knuckles joined Sonic and Tails as they headed off to find their next adventure.

### Shadow The Hedgehog

Knuckles left his post on Angel Island and joined forces with most of his friends and GUN's forces to repel the Black Arms invasion of Mobius.

#### Glyphic Canyon

Arriving in Glyphic Canyon, Knuckles attempted to assist GUN by driving off the Black Arms infesting the area. There, he met Shadow, who had just been teleported to the ruins by Black Doom. Upon meeting him, Knuckles filled Shadow in on the Black Arms around them and requested his assistance in clearing the area of the Black Arms.

Shadow accepted Knuckles' request, Knuckles and Shadow managed to drive the Black Arms out of the area, and as well find one of the Chaos Emeralds amongst the ruins.

#### Central City

In Central City, Knuckles discovered that the Black Arms had set up bombs across the city that would destroy the entire city, a tragedy that Knuckles did not intend to come true. When there were only a few minutes left until the bombs would explode, Knuckles noticed Shadow had arrived in Central City and asked for help defusing the bombs, aiding G.U.N. as they sent in their bomb squads to defuse the larger ones.

Shadow accepted Knuckles' request, Knuckles and Shadow succeeded in defusing enough bombs and managed to save the city, buying time for the President to be evacuated by the Commander and GUN to their headquarters via a G.U.N. flying battleship.

#### Black Comet

Having gotten onboard the Black Comet, Knuckles assisted G.U.N. in attacking the Black Arms' base, with Knuckles planning to destroy the comet's core. On his way to the core, Knuckles came across Shadow and asked him for his help to get to the center.

Shadow accepted Knuckles' request, Knuckles and Shadow made it to the center of the Black Comet, where they found the Chaos Emerald that the Black Arms had stolen. Though Shadow refused to follow Knuckles any further, Knuckles still came to Shadow's aid when the hedgehog was attacked by Dr. Eggman and his Egg Dealer. Eventually, the two destroyed Eggman's contraption and claimed the final Chaos Emerald before Shadow personally ended Eggman's life.

#### Last Story

Knuckles arrived with Sonic, Tails, Amy, Rouge and Dr. Eggman to stop Shadow from giving the Chaos Emeralds to Black Doom. Black Doom, however, took the Emeralds and used an enhanced Chaos Control to transport the Black Comet to the surface, planning to use humans as energy sources for his kind. As Knuckles prepared to act, he and the others were paralyzed by a special nerve gas, and Black Doom unleashed the Death leeches to prey on them. Shadow, however, proved to be immune to the gas, and he left Knuckles and the others behind as he pursued Black Doom.

Knuckles and the others eventually escaped the Black Comet and found some shelter from where they cheered Super Shadow on as he fought and defeated Devil Doom. Knuckles then witnessed Super Shadow sending the Black Comet back into space and blowing it up with the Eclipse Cannon. As Eggman then tried to sneak away to claim the Chaos Emeralds, Knuckles furiously chased after him.

### Sonic Battle

Knuckles heard the news that an E-121 Phi had been robbing jewelry stores. Later, Knuckles met up with Sonic, Tails and Emerl, a robot Sonic had found, who had come to ask for the Chaos Emerald in his possession to develop Emerl. Knuckles, however, mistook Emerl for the E-121 Phi and attacked him but was defeated. Knuckles then relinquished his Chaos Emerald and learned about Emerl's abilities and that Dr. Eggman and Rouge were after him, making him suspicious.

Later, Knuckles met Tails and Emerl, where he, after a brief fight with Emerl, was then told by Tails to come to Emerald Beach when their path was blocked by Chaos Gamma. In the end, Knuckles took care of Gamma alone, allowing Tails and Emerl to leave. When Chaos Gamma escaped, Knuckles got to Emerald Beach, where he saw Rouge leave and heard what had happened from Sonic. When Knuckles tried to ask Emerl, he became infuriated as Emerl continued to ignore him, especially upon Sonic's orders, which made Knuckles fight both of them.

Later, after Emerl had been stolen by Rouge, Knuckles and Tails aided Sonic when he fought Rouge to get Emerl back, with Rouge eventually surrendering Emerl. Later on, when Knuckles learned about how Emerl needed Chaos Emeralds and that he grew stronger the more he fought, he vowed to help realize Emerl's full potential. Finding Emerl with Tails in Emerald Town, Knuckles trained with him until they heard the news saying that an E-121 Phi was in Night Babylon and Knuckles took Emerl with him to deal with it.

In Central City, Knuckles briefly came across Amy, only to be attacked by Chaos Gamma. After forcing Chaos Gamma to leave, Knuckles encountered Rouge, who filled him in on Chaos Gamma and learned the robot wanted revenge at Emerl. After processing this, Knuckles and Emerl continued to Night Babylon. There, they met a clerk who mistook Emerl for a Phi and called a Guard Robo. After destroying it and escaping, Knuckles lost his temper and yelled at Emerl and upset him. Apologizing for his outburst, Knuckles had Emerl wait while he went into a casino. When Knuckles returned, however, Emerl was gone, and he began looking for him. After several skirmishes with store clerks, Knuckles found Emerl with Rouge. Knuckles thought Rouge was after Emerl, but he found her innocent. Just then, they found the Phis. Knuckles and Emerl proceeded to destroy them and got their Emerald Shards before being given an Emerald Shard from Rouge as well who suggested they ask Tails about the Emerald Shards.

Heeding Rouge's advice, Knuckles returned to Tails who explained they could get a whole Chaos Emerald if the collected two more shards from the Phis. Knuckles then left with Emerl to train him and fought him to settle their score. After their battle, Dr. Eggman appeared and attacked them with a Phi, but Knuckles and Emerl defeated it, claimed its Emerald Shard and chased Eggman.

Finding Eggman in Central City, Knuckles and Emerl destroyed another Phi and took its Emerald Shard. There, Knuckles acknowledged Emerl as his battle partner, before hearing Eggman say that he was heading to Gimme Shelter as he escaped.

As Knuckles entered Gimme Shelter, he was caught in Eggman's "spiky rodent trap," and Eggman revealed that he had tricked him into coming. As Eggman announced the plan to have Emerl absorb his Final Egg Blaster, Knuckles was left in Chaos Gamma's hands, but Emerl defeated it. Afterward, Knuckles asked Emerl to free him, but Emerl began mocking him for his lack of strength, infuriating him enough to try breaking free himself until Emerl shut the trap down, causing Knuckles to hurl himself due to his struggling. Heading back to Emerald Town, Knuckles had Tails use their Emerald Shards to make a whole Chaos Emerald, which they gave to Emerl. As Tails wondered what happened during the pair's adventure, Knuckles asked Emerl to keep it a secret that he got tricked by Eggman. Regardless, Emerl still told Sonic, who had just arrived, and Tails, making Knuckles explode with anger.

Later on, Knuckles met Emerl again, who had come to fight him under direction from Shadow so that Emerl could fight the latter. Later, when Eggman revealed his newest Death Egg and its Final Egg Blaster, Knuckles met up with Sonic, Tails and Emerl at Holy Summit, where he revealed that Chaos had returned, a sign of danger. As Emerl went to the Death Egg to stop Eggman, Knuckles and the others watched Emerl back on Mobius.

When Eggman was defeated, however, Eggman fired the Final Egg Blaster, destroying some stars. The sudden release of enormous amounts of energy caused Emerl to revert to his original destructive programming. However, Eggman could not control Emerl as excepted, and Emerl prepared to fire the Final Egg Blaster at Mobius. Knuckles then urged Sonic on as he went to the Death Egg to stop Emerl with the Master Emerald. When that failed, Sonic had no choice but to destroy Emerl. Once the deed was done, the world was saved, though everyone mourned Emerl's death.

### Sonic Rush

Knuckles was walking around on his own when he met Cream and her new friend Blaze the Cat. As he was introduced, Knuckles got angry when Cream mentioned his shortcomings but then noticed that Blaze held a Sol Emerald. Sensing that its power was similar to Chaos Emerald energy and thus a Chaos Emerald, Knuckles advised Blaze that she gave it to Sonic for safe keeping. Blaze, however, denied his claim of having a Chaos Emerald and tried to leave, but Knuckles thought she was lying and tried to chase after her. During the chase, however, he was buried under a pile of rocks by Blaze.

Eventually, Knuckles pulled himself out of the rocks and met Sonic and Tails. Knuckles then told them how Blaze got him stuck there and took off to punch some things to vent his anger, inadvertently opening a path blocked by rocks. Following that, Knuckles searched for Blaze to get some payback and eventually found her with Cream and Amy but was held back by Amy while Cream and Blaze escaped. In the aftermath of Sonic and Blaze's final battles with Dr. Eggman and Eggman Nega, Knuckles joined up with the others in celebration, where he warned Sonic that Amy was coming.

A while afterward, Knuckles, along with Sonic, Tails, Amy and Cream, came to Blaze's aid when Eggman and Eggman Nega drained the Sol Emeralds of their power to conquer both Sonic's dimension and Blaze's world. With Knuckles and the others supporting her, Blaze recharged the Sol Emeralds, becoming Burning Blaze, and joined up with Super Sonic, and together, they defeated the doctors and saved their worlds, thanks to the help of Ground Zero.

### Sonic Advance 3

At some point, Mobius was split into seven regions by a massive Chaos Control induced by Dr. Eggman, Knuckles met Sonic and Tails in Sunset Hill. Seeing the trouble, Knuckles joined his friend to help, despite being declined by Sonic.

Traveling across the different regions, Knuckles and his friends eventually got the seven Chaos Emeralds and had Amy and Cream join them. Along the way, Knuckles also faced Dr. Eggman's newest creation, Gemerl, a rebuilt version of Emerl. Eventually, Knuckles and his friends got to the Emerald Altar where they beat the Hyper EggRobo and used the Master Emerald to return the world to normal. Later, following Sonic's return from his and Eggman's battle with Ultimate Gemerl, Knuckles remained behind at the Master Emerald's shrine and watched on satisfied as his friends took their leave.

### Sonic Riders

Team Sonic arrived in Future City in search of a Chaos Emerald when the Babylon Rogues appeared. When Tails read that they had the Emerald, Knuckles aided Sonic in intercepting the Rogues and managed to knock Storm off his Type-S. Knuckles and Tails then followed Sonic when he chased after Jet, only for the two to find him knocked down as the Babylon Rogues escaped.

The next day, the team saw Dr. Eggman on the local monitors, announcing the EX World Grand Prix, and that the entry fee for the contestants was a Chaos Emerald, with the winner getting to claim all seven. Seeing that the participants Dr. Eggman had found were none other than the Babylon Rogues, Knuckles and the team decided to enter the competition.

After the qualifications rounds, Knuckles and his team met Amy, who had also signed up for the tournament so she could keep an eye on Sonic. After then hearing Tails explain the legends about the Babylon Rogues and Babylon Garden, Knuckles wondered how Extreme Gears worked, but found Tails' explanation too confusing. Just then, Wave came by and mocked Tails' Blue Star, much to Knuckles' annoyance. Shortly after though, Knuckles and the others had to hurry out to next race.

After the race, Knuckles was walking through the Egg Factory when he bumped into Storm. Recognizing him, Knuckles wanted to settle the score between them. When Knuckles and Storm heard that the next race was about to start, however, they decided to settle their dispute on the racetrack. In the end, Knuckles won the race.

Before the semifinals, Knuckles and Tails watched Sonic practice his Extreme Gear techniques until Jet appeared to mock Sonic before leaving. Eventually, Knuckles and his team got to the finals, which Jet won after Wave sabotaged Sonic's Blue Star. They then witnessed Jet claim and use the seven Chaos Emeralds in tandem with the Key to Babylon Garden to reveal Babylon Garden itself, with the intention of claiming its treasure. Eggman, however, stole the Key so that he could take the treasure for himself, believing it to be technology that he could use to conquer the world. Knuckles and Tails followed Sonic however, as he headed out to stop Eggman.

Using the Tornado 2, Knuckles and Tails got to Babylon Garden, while Sonic took off on the midway to chase Eggman. There, they met Wave and Storm, and Knuckles got ready to fight Storm but had to stop when a flock of E-10000 robots attacked. Chasing after Wave and Storm, Knuckles and Tails got to Sonic's location as Sonic stopped Dr. Eggman and returned the Key to Babylon Garden to the Rogues. Knuckles and the others were about to leave when Amy arrived and chased furiously after Sonic for attacking Eggman while he held her hostage. They heard a heard a roar and decided to check it out. Arriving inside the Babylon Garden, Knuckles and the group saw that the Babylon Rogues had awoken the Babylon Guardian, and were then forced to fight it.

After beating the Babylon Guardian, the group found the treasure of Babylon, which was revealed to be a Magic Carpet, much to the disappointment of Eggman. With the whole ordeal over, Team Sonic and the Babylon Rogues went their separate ways, knowing they would meet again some day.

### Sonic The Hedgehog (2006)

Knuckles saw Dr. Eggman on the outskirts of Soleanna and received a message from the doctor, who told him to give it to Sonic. Telling Tails he wanted to see Sonic, Knuckles awaited Sonic's arrival until he got there and gave him the message. From it, the trio learned that Eggman demanded Sonic's Chaos Emerald in exchange for the return of Princess Elise.

Despite being certain it was a trap, Knuckles, Sonic and Tails went to White Acropolis. When Sonic handed over the Chaos Emerald, however, Eggman sent them to an apocalyptic future with a time machine. There, they met Shadow and Rouge. The group then decided to work together to get home by finding enough Chaos Emeralds for a Chaos Control powerful enough for time travel.

While searching for the Chaos Emeralds, Knuckles, Sonic, and Tails briefly saw Silver and Blaze talking with Mephiles before they went back in time. The group then learned from their database that Elise would die in the Egg Carrier's future crash-landing. Locating a Chaos Emerald in Flame Core, Sonic his friends met up with Rouge and Shadow and went to the central volcano, where Rouge found the Emerald only for Iblis to attack them. After defeating Iblis, Sonic and Shadow use their two Chaos Emeralds to create a time-space rift, which Knuckles, Sonic, and Tails used to return to the present. After that, Knuckles helped find information on Elise's whereabouts. Later on, Knuckles helped Sonic through Aquatic Base to save Elise from her imminent death onboard the Egg Carrier.

Later on, Knuckles passed through Soleanna Castle Town with Tails and Amy when they were suddenly caught in a spatial distortion created by Solaris and send to End of the World, where they met Shadow, Silver, Rouge, E-123 Omega and Eggman. There, they also found Elise and Sonic, and Knuckles saw to his shock that Sonic was dead, having been killed as a part of Mephiles' plan to remake Solaris. As Solaris prepared to consume time itself, Knuckles opted to destroy him, but it was deemed impossible due to Solaris' temporal omnipresence and Sonic's passing. When Elise sensed that Sonic's soul was still among them, however, Knuckles and the others collected the seven Chaos Emeralds to revive Sonic. After Elise revive Sonic as Super Sonic, Knuckles stood behind and supported Super Sonic, Super Shadow, and Super Silver as they defeated Solaris before they all were engulfed in light. When Sonic and Elise then ensured Solaris never came to exist; time was reverted, resulting in the events and memories of the adventure being erased and Knuckles to be returned to where he was prior to the events, thanks to the help of Ground Zero.

### Sonic Rivals

Knuckles was guarding the Master Emerald when it suddenly disappeared. His search for the Master Emerald eventually took him to Onyx Island where he saw who he believed was Dr. Eggman, but was really Eggman Nega disguised as Dr. Eggman with Sonic, and he suspected the doctor was behind the theft. Confronting Eggman Nega, the doctor showed he had turned the Master Emerald into a card with his special camera. Meanwhile, Sonic asked Eggman Nega where Tails and Amy were, and Eggman Nega showed that he had turned them into cards too. As Eggman Nega escaped, Knuckles raced Sonic to the doctor.

After they had found Eggman Nega, the doctor attacked in the Egg Turtle which they defeated. After the doctor had escaped, Knuckles met Shadow, who also looked for Eggman Nega. However, when Shadow criticized him for letting the doctor escape, Knuckles raced Shadow to find Eggman Nega first. When they reached Eggman Nega, Knuckles demanded the Master Emerald back, but the doctor attacked them in the Egg Falcon, which they defeated.

After the battle, Knuckles was teleport to another area by Eggman Nega with the Master Emerald. There, he met Silver, who had come to bring Eggman Nega back to the future. After answering Silver's questions, Knuckles started asking him, but Silver did not answer, provoking Knuckles to chased after him. Eventually, Knuckles found Eggman Nega and asked how he stole the Master Emerald only to be told that Onyx Island was Angel Island before he was attacked by Metal Sonic. After beating Metal Sonic, Knuckles pondered about how Onyx Island could be Angel Island when he met Shadow. As Shadow berated him for letting the doctor get away again, Knuckles raced Shadow to Eggman Nega.

When Knuckles found Eggman Nega, the doctor explained that Onyx Island was Angel Island from the future, before he attacked with the Egg Lynx. After defeating the machine, Knuckles tried to make sense of what Eggman Nega said when he met Sonic and Tails. Not wanting Sonic to outdo him as he seemed to know where the doctor was, Knuckles raced Sonic to Eggman Nega.

When they found Eggman Nega, Knuckles demanded a full explanation. Eggman Nega then revealed that the Master Emerald disappeared because he turned it into a card in the future, which due to the Master Emerald's properties made it disappear in all time frames, and that he then used it to transport the Angel Island in the future to the present as Onyx Island. Deeming Eggman Nega responsible for all this, Knuckles defeated both the Egg Kong and Metal Sonic. Frustrated at his constant defeats, Eggman Nega told Knuckles that he now planned to turn Mobius into a card and escaped. Sonic and Tails then showed up in the Tornado when they were heading to Eggman Nega’s base, and Knuckles teamed up with them to stop Eggman Nega. On their way through Eggman Nega’s base, Knuckles and Sonic met Shadow and Silver, and they all put aside their differences to stop Eggman Nega.

At the center of the base, Knuckles and the others found a large spaceship with Eggman Nega’s special camera equipped on that he planned to use to turn the world into a card. Knuckles then noticed that Eggman Nega planned to fuel the device with the Master Emerald's card and some other cards, but the four rivals destroyed the spaceship as it took off, thus foiling Eggman Nega’s plan. With the Master Emerald back, Knuckles planned to use it to send Onyx Island back to the future where it belonged, and as well to look for the other treasures Eggman Nega had trapped in cards.

### Sonic Rivals 2

Knuckles looked for the Master Emerald when it went missing again. Arriving on an island, Knuckles suspected that Dr. Eggman was behind the theft. Knuckles then met Rouge, who offered to take him to Eggman if he helped her find the Chaos Emeralds, which he agreed to. Knuckles then saw Sonic and Tails, who were also looking for Eggman and asked Sonic if he had seen Eggman. Sonic, however, insisted on getting to Eggman first, so Knuckles competed with Sonic to find Eggman.

Knuckles and the others eventually found Dr. Eggman, who was really Eggman Nega masquerading as Dr. Eggman. Knuckles demanded the Master Emerald back, but the doctor played innocent and attacked in his Egg Liner. Knuckles and Rouge then followed Eggman Nega to Sunset Forest Zone, where Rouge thought the doctor had to have an Emerald Detector to locate the Chaos Emeralds and Master Emerald, and they decided to find this device. On his own, Knuckles met Shadow who insisted on keep them from the Emeralds once he told him the story, forcing him to fight him.

Knuckles and Rouge eventually found Eggman Nega with Shadow and Metal Sonic. As Knuckles demanded Eggman's Emerald Detector, the doctor attacked in the Egg Dealer. After defeating it, Knuckles and Rouge got the Emerald Detector, which picked up a signal. As Knuckles searched the area in Neon Palace Zone, he met Silver, who wanted some Chao. After looking for Rings for the Emerald Detector, Knuckles asked Silver of why he sought Chao but thought he was crazy when he heard it was to save the world, and they ended up fighting. Later on, Knuckles and Rouge found Eggman Nega with Silver and Espio, and the doctor attacked in the Egg Dealer, but the group defeated it.

Arriving in Frontier Canyon Zone, Knuckles and Rouge lost track of Eggman Nega. The Emerald Detector soon found more Emeralds, but Knuckles was frustrated that none of them were the Master Emerald. Knuckles then saw Shadow and Metal Sonic nearby and followed them, with Knuckles chasing Metal Sonic after him after hearing Eggman's voice come from the robot. Shortly after, Knuckles met Rouge, who explained that Eggman Nega sought to bring forth the Ifrit to destroy the world. Just then, Eggman Nega attacked them in the Egg Bull, but Knuckles and Rouge defeated it despite inference from Shadow and Metal Sonic.

At Mystic Haunt Zone, Knuckles was convinced by Rouge that Eggman was here. While looking, Knuckles met Espio and asked him if he had seen Eggman or Shadow, hoping they had the Master Emerald, but was dismissed. Soon after, he met and fought Metal Sonic so he could bring him to Eggman Nega. True enough, Knuckles found Eggman Nega and Shadow and demanded the Master Emerald. However, Eggman instead revealed that he used Rouge to collect the Chaos Emeralds to opening the portal to the Ifrit's world. As Silver then arrived, Knuckles had enough and fought the Egg Phantom.

After the battle, Knuckles saw that the portal to the Ifrit's dimension was opening, despite Rouge only having six Chaos Emeralds. Intending to stop the Ifrit, Knuckles dragged Rouge with him into the Ifrit's dimension. After entering, Knuckles lost track of Rouge and began to look for her, and soon after found the Ifrit, who had taken control of Rouge. With no choice, Knuckles fought both Rouge and the Ifrit. Despite Knuckles occasionally falling prey to the creature's mind control, the two defeated the Ifrit, thus preventing it from leaving its world and got back to their home dimension before the portal closed.

After checking up on Rouge, Knuckles was annoyed the Master Emerald was still lost but then discovered that it had been inside the Emerald Detector all along. As Knuckles was praise by Rouge for his heroism, he saw Rouge leave with the Master Emerald, and he chased after her.

### Sonic Riders: Zero Gravity

Knuckles was driving with Sonic and Tails through Monopole with a mysterious meteorite Tails had found the other night. On their way to Megalo Station, however, Knuckles and the others were attacked by SCR-HD and a group of SCR-GP, a part of a currently global robot rampage who were after the meteorite. In the insuring chase, the group crashed and fell out a 300-story building, though Knuckles and Tails saved themselves by flying while Sonic was saved by the meteorite which could manipulate gravity.

After that, Knuckles and the group tried to hide from the robots, where they met Amy, who was being chased by the robots because she had a meteorite similar to theirs. The group then decided to go to MeteorTech, who created the robots, for answers. There, Knuckles and the gang were discovered by security, but the Babylon Rogues arrived, and Jet repelled the security robots with another meteorite. As the Babylon Rogues demanded their meteorites, called the Arks of the Cosmos, Knuckles was ready to fight but had to wait when more robots showed up.

Arriving in the control room, the group were surprised to find Dr. Eggman, who owned of MeteoTech, though Eggman claimed to have no part in the global robot rampage. However, when Eggman recognized Sonic's Ark of the Cosmos, Knuckles threatened the doctor to tell them what he knew. Eggman then revealed that MeteoTech’s computer was powered by one of the Arks of the Cosmos and that the robot leader, SCR-HD, which also had an Ark of the Cosmos, sought them out for reasons unknown. The group then noticed Amy was gone and saw her being chased by SCR-HD and Storm on a computer screen, and Team Sonic left to save her.

When they found Amy, Knuckles and the others learned that SCR-HD had suddenly blown up and Storm had taken its Ark of the Cosmos. However, Tails deduced that they had to remove the Ark of the Cosmos in MeteoTech’s mother computer to stop the rampaging robots. As they tried to figure where the mother computer could be, Amy remembered a place Storm mentioned with info on the Arks of the Cosmos, which Knuckles recognized it as Gigan Rocks and personally lead the group there.

Arriving at Gigan Rocks, Knuckles translated the ancient scripts there, and they learned that the Arks of the Cosmos were ancient power units for Babylon Garden. After then seeing the Babylon Rogues chase after Eggman above them, Knuckles translated some more inscriptions, which helped the group figure out the location of the MeteoTech’s computer mother. When they arrived there, Knuckles and the others found the Crimson Tower and the Babylon Rogues, who revealed that Eggman had stolen their Arks of the Cosmos. Understanding that Eggman planned to use the Arks of the Cosmos to control all the world's robots and conquer the world, Knuckles and the others raced against the Babylon Rogues to Eggman.

At the end of the race, Eggman was stopped, and the robot rampage came to an end. After Babylon Garden had appeared due to all Arks of the Cosmos being present and handing over their Arks of the Cosmos, Knuckles, Sonic and Tails were about to leave when SCR-HD appeared and took all five Arks of the Cosmos to Babylon Garden. This transformed Babylon Garden into Astral Babylon, forming a black hole that threatened to consume the planet. Knuckles, Tails and the Babylon Rogues then followed Sonic to Astral Babylon to disconnect the engine where they faced Master Core: ABIS and defeated it, saving the world.

Later, Knuckles, Sonic, Amy, and Tails returned to Monopole, where Tails told Knuckles and the rest of how the Arks of the Cosmos made the robots to go amok. Knuckles and then others then saw Jet flying by, who challenged Sonic to a new race, which Sonic accepted.

### *S*onic Chronicles: The Dark Brotherhood

Knuckles, Sonic, Tails, and Amy faced Dr. Eggman on the Egg Carrier, and successfully made the flying vessel crash into Metropolis while Eggman was presumed dead in the crash. Some time later, Knuckles learned that six of the Chaos Emeralds had been stolen by a group dubbed the Marauders. Intending to stop them, Knuckles came to Tails and had him set up a trap for the Marauders by using the last Chaos Emerald. When the Marauders appeared, however, they jammed the trap and turned on Knuckles who was overwhelmed by numbers and defeated by their leader, Shade the Echidna, for then to be taken with them as they escaped with the Chaos Emerald.

Locked up in their hideout, Knuckles attempted to break out, when he met Sonic, Tails and their friends, who had come to rescue him. When Knuckles decided to head back to Angel Island to protect the Master Emerald from the Marauders, they discovered that the island was gone. Suspecting that Eggman was working with the Marauders, the group began looking for the doctor using Tails' Eggman Detector. With a Pattern Generator made from Eggman Devices they found, the team located Eggman. However, the doctor claimed that he was against the Marauders as well and that he had also been reformed, willing to help Knuckles and the others fight the Marauders by leading them into Metropolis where the Marauders had drawn Angel Island to with the Chaos Emeralds, which they accepted.

On their way there, Knuckles and the others met Shade and her lackeys, and Knuckles discovered that Shade and the Marauders were a group of echidnas called the Nocturnus Clan, exiled to the Twilight Cage in ancient times. After defeating them, Shade blocked their way to Metropolis, but Knuckles and the others found a way around it. Meanwhile, Knuckles was torn to finally meet others of his kind but was forced to fight them. Regardless, Knuckles was joined by Sonic and his party when he went to Angel Island to secure the Master Emerald, while Tails and Eggman made a weapon against the Nocturnus Clan.

By hijacking an airship and with some help from Tails' team, Sonic and his group got to Angel Island where they met the Nocturnus Clan’s leader, Imperator Ix, who sought to rule the world. Ix unleashed his soldiers on them, but Knuckles and Sonic held them off until Tails and Eggman came and deployed their weapon, which dispatched the soldiers. United, the team fought Ix until the techno wizard blew him and the others away, even Shade, but Knuckles saved Shade. Ix then stole the Master Emerald and used it to create a wormhole into Knuckles' pocket dimension so that the Nocturnus Clan could conquer it, while Angel Island fell from the sky. The team then came up with the plan of going after Ix into the Twilight Cage and reclaim the Emeralds, and Shade joined Sonic's team to stop Ix's plan, having realized the evil nature of her leader.

Having constructed the Blue Cyclone, Knuckles and the group entered the Twilight Cage, while Eggman stayed behind. Inside the Twilight Cage, Knuckles and his team got five of the Chaos Emeralds back and got the alliance of the alien races residing there. When they planned to invade Nocturne to get the last Emeralds, Knuckles remained reluctant to fight Ix and instead hoped to return the echidnas to Mobius peacefully so that he would not be alone anymore. With the assistance of the alien races, Knuckles and the others got to Nocturne. Once there, Knuckles got the team split into two, with him and Shade leading their group and Sonic and Tails leading the other, to find the last two Chaos Emeralds, which Charyb and Scylla possessed. Knuckles, meanwhile, planned to redeem Ix before Sonic could get to him.

Soon after, Knuckles and his team were almost defeated by Gizoid Centurions but were saved by Sonic and Tails. Knuckles and his team then found and defeated Scylla and got his Chaos Emerald, before helping Sonic's group defeat Charyb. Afterward, Knuckles and his team were teleported to Ix, who tried to persuade Knuckles to join him. Realizing Ix was unredeemable, Knuckles declined and stood by his duty while vowing to help the Nocturnus Clan his way before fighting Ix. Sonic then arrived and ensured the defeat of Ix while Knuckles reclaimed the Master Emerald. With his final defeat, Ix started to close the wormhole out of the Twilight Cage, but Knuckles and the others got through it just in time. When they returned home, however, Knuckles and the others saw that much time had passed, thus allowing Eggman to rebuild his forces, which they faced upon exit from the Twilight Cage.