Timeline of events in Pokémon the Series: Sun & Moon

In , Ash Ketchum travels to the tropical Alola region with his mother and his buddy . Enrolling in the Pokémon School, he befriends his new , , , , and . Gifted a Z-Ring by the , Ash undertakes the island challenge to master Alola's powerful Z-Moves. The Alola region ends up becoming a second home for Ash as he and his classmates face challenges and threats together, such as the mysterious interdimensional , the troublesome thugs of Team Skull, and the newly established Alola Pokémon League, where the title of Alola's first is up for grabs.
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==Timeline==
These events are listed in chronological order as opposed to solely release order.
===Alola===
Episode 	Details
Alola to New Adventure! 	
* , , and Mimey are revealed to have traveled to the Alola region.
* Ash encounters a roaming for the first time.
* Ash is revealed to have changed into and left all of his party Pokémon, except , at Professor Oak's Laboratory.
* is revealed to have tasked Ash with delivering an to his Alolan cousin, Samson Oak.
* Ash learns about Ride Pokémon, Z-Moves, and the island challenge.
* Ash meets , , , , , Samson Oak, and for the first time.
* Mallow meets Delia for the first time
* Ash delivers the Egg to Samson Oak.
* Ash encounters Team Skull for the first time.
* Ash witnesses a Z-Move for the first time.
* Ash encounters the guardian deity of Melemele Island, , for the first time.
* Ash receives a Z-Ring equipped with an Electrium Z from Tapu Koko.
* Delia and Mimey both return to Pallet Town, while Ash stays in Alola to study at the Pokémon School.
The Guardian's Challenge! 	
* learns about regional variants.
* Sophocles's Togedemaru is revealed to know and have as her Ability.
* Ash encounters again, with encountering it for the first time.
* Ash and have a battle against Tapu Koko, which gets called off when Tapu Koko flees.
* Ash and Pikachu perform for the first time.
** In the process, Ash also performs a Z-Move for the first time.
* Ash's Electrium Z shatters right after being used.
* Ash decides to take on the island challenge in order to get new Z-Crystals and qualify as a Z-Move user.
* Ash receives a new from .
Loading the Dex! 	
* arrives in the Alola region, having been assigned by to capture the region's unique Pokémon.
* A inhabits Ash's new Pokédex, turning it into a .
* Jessie and James are revealed to have deposited and at .
* Ash tries to catch a , but it decides to side with Team Rocket instead.
* encounter Team Rocket for the first time.
* A starts following and caring for .
First Catch in Alola, Ketchum-Style! 	
* tries and fails to a .
* James is revealed to own a Luxury Ball.
* Jessie uses James's Luxury Ball to catch the that had encountered earlier.
* Ash catches a .
Yo, Ho, Ho! Go, Popplio! 	
* reveals how she first met .
* meets Harper and Sarah, Lana's younger sisters, for the first time.
That's Why the Litten is a Scamp!‬ 	
* is revealed to know .
* tries to Litten, but eventually decides to let it go.
Lillie's Egg-xhilarating Challenge! 	
* Samson Oak gives and an , which agrees to take care of.
* Ash and meet Hobbes, the butler for Lillie and her family, for the first time.
* Ash's Rowlet is revealed to know and .
* Lillie's phobia of Pokémon is revealed to be the result of a traumatic experience involving that she doesn't remember.
* Lillie overcomes her phobia of Pokémon a little bit, being able to touch the Egg entrusted to her.
To Top a Totem! 	
* meets the kahuna of Melemele Island, Hala, for the first time.
* Hala reveals that the Z-Ring equipped with an Electrium Z that gave to Ash earlier was taken from him.
* Ash clears his first trial in the Verdant Cavern, earning a Normalium Z from the as a reward.
* Ash becomes qualified to challenge Hala's grand trial.
* Officer Jenny convinces a to join her team.
Trial and Tribulation! 	
* and perform for the first time.
* Ash battles Hala in the Melemele Island grand trial and wins.
* Hala goes to reward Ash with a Fightinium Z, but switches it with an Electrium Z, which Ash receives instead.
Young Kiawe Had a Farm! 	
* Ash's Rowlet performs for the first time.
* visits Akala Island for the first time.
* Ash meets 's family for the first time.
* Kiawe's Turtonator is revealed to know .
* Kiawe reveals that he received his from his grandfather.
The Sun, the Scare, the Secret Lair! 	
* Jessie and James try and fail to a and , respectively.
* decides to make Bewear's den their base of operations in Alola.
* James catches a .
Racing to a Big Event! 	
* is revealed to have nicknamed the she had been raising Snowy.
* The Egg that Lillie and have been taking care of hatches into an .
Getting to Know You! 	
* The that delivered to Samson Oak hatches into a .
* Snowy, the Vulpix that hatched in the previous episode, is revealed to know .
* catches Snowy, making it her first Pokémon.
* Lillie becomes able to touch her own Pokémon, but not others.
Rocking Clawmark Hill! 	
* is revealed to not be 's Pokémon, but a wild Pokémon that he takes care of.
* Rockruff is revealed to know and and learns .
* .
They Might Not Be Giants! 	
* Lana's Popplio is revealed to know .
* is revealed to know .
Crystal-Clear Sleuthing! 	
* updates itself with a video camera function.
A Seasoned Search! 	
* meets Abe, 's father, for the first time.
* completes the construction of their base in Bewear's den.
* Mallow's evolves into and learns and .
A Guardian Rematch! 	
* Ash's Rockruff performs for the first time.
* meets 's family for the first time.
* Ash and have a rematch with , with no clear winner.
Partner Promises! 	
* encounters the guardian deity of Akala Island, , for the first time.
One Journey Ends, Another Begins... 	
* is revealed to have learned , although it hasn't mastered it yet.
* The elderly that Litten was living with vanishes.
* .
A Shivering Shovel Search! 	
* Kiawe's Charizard is revealed to know .
* Ash's Litten masters .
Getting the Band Back Together! 	
* updates itself with a function.
Alolan Open House! 	
* Ash's Litten is revealed to know .
* meets for the first time.
A Team-on-Team Tussle! 	
* witnesses a Z-Move for the first time and learns about Z-Crystals.
* Team Rocket encounters Team Skull for the first time.
* Team Rocket and Team Skull fight for a Darkinium Z, which Team Rocket takes for themselves.
So Long, Sophocles! 	
* brings a as a present.
* Sophocles the .
A Glaring Rivalry! 	
* meets , 's older brother, for the first time.
* Ash has a with Gladion, but it is interrupted by .
* Team Rocket meets Gladion for the first time.
* Ash learns that he can get a Rockium Z from the island kahuna of Akala Island.
The Ol' Raise and Switch! 	
* has her first and wins.
* Lillie becomes able to touch Ash's Pikachu.
* battles Lillie, although the end result is left unknown.
The Island Whisperer! 	
* , , , , and meet Olivia, the Island kahuna, for the first time.
* Ash and travel to Akala Island along with Olivia and .
Treasure Hunt, Akala Style! 	
* tries and fails to an .
* finds a Sparkling Stone, which Olivia takes to be modified into a Z-Ring for her.
Big Sky, Small Fry! 	
* Lana's Popplio learns .
* clears the trial at Brooklet Hill with 's help, earning a Waterium Z from a as a reward.
* Olivia converts Lana's Sparkling Stone into a Z-Ring and gives it back to her.
A Crowning Moment of Truth! 	
* Kiawe's Turtonator is revealed to know , and also learns .
* an .
Currying Favor and Flavor! 	
* Ash's Litten performs for the first time.
* clears the trial in Lush Jungle, earning a Grassium Z from the as a reward.
* Ash becomes qualified to challenge Olivia's grand trial.
Trials and Determinations! 	
* and perform for the first time.
* Ash battles Olivia in the Akala Island grand trial and wins, earning a Rockium Z as a reward.
* Olivia informs Ash that his will evolve soon.
Rising from the Ruins! 	
* is revealed to own a nicknamed "Silvally".
* 's evolves into a .
* Ash, , and leave Akala Island and return to Melemele Island.
Mimikyu Unmasked! 	
* and perform for the first time.
Balloons, Brionne, and Belligerence! 	
* , , and meet Ida for the first time.
* Lana and perform for the first time.
Mounting an Electrifying Charge! 	
* Sophocles's Charjabug is revealed to know .
* Sophocles, , and meet Horacio, Sophocles's rival.
* participates in a Charjabug race with Ash and Kiawe and wins.
Alola, Kanto! 	
* and travel to Kanto for an extracurricular activity and arrive in Pallet Town.
** In the process, Ash's classmates visit Kanto for the first time. 
* also travels to Kanto, but are later taken back to Alola by .
* Ash reunites with and , while Ash's classmates meet them for the first time.
* , , , , and meet and for the first time.
* Lana, Kiawe, and Sophocles meet for the first time.
* Misty and Brock meet , Samson Oak, and Bewear for the first time.
* Ash's Lycanroc is revealed to have learned .
* Ash and his classmates travel to Cerulean City to visit the Cerulean Gym.
When Regions Collide! 	
* learn about Pokémon Leagues.
* and have a Multi Battle against , but the battle is called off.
* Misty's Psyduck is revealed to have mastered .
* and have a Multi Battle against , but the battle is called off.
* Brock's Geodude is revealed to have learned and his is revealed to have learned Gyro Ball and .
* Brock and Misty are revealed to each have obtained a Key Stone, while Brock is revealed to have obtained a Steelixite and Misty is revealed to have obtained a Gyaradosite.
* Ash's classmates learn about Mega Evolution and witness one for the first time.
* Brock and Misty witness a Z-Move for the first time.
* has a battle against Brock and loses.
* Misty's Gyarados is revealed to have learned , , and .
* has a battle against Misty and wins.
* reveals that he intends to establish a Pokémon League in Alola.
* Ash, his classmates, Professor Kukui, Samson Oak, and return to Alola.
* follows Ash and his classmates to Alola on top of their plane.
A Dream Encounter! 	
* finds and befriends a , which nicknames .
* Lillie reunites with her mother, .
* Ash meets Lusamine, , , and Wicke for the first time.
* Ash learns about the Aether Foundation and Ultra Beasts.
Now You See Them, Now You Don't! 	
* is revealed to know .
Deceiving Appearances! 	
* and visit Aether Paradise, with Ash, , , , and visiting it for the first time.
* Kiawe, Sophocles, Mallow, and Lana meet , , Wicke, and for the first time.
* Faba is revealed to have hired to work for him as s.
* Team Rocket learns about and the Ultra Beasts.
A Masked Warning! 	
* Ash's Lycanroc is revealed to go berserk when its fur gets dirty.
* meets again.
* Ash learns that 's fear of touching Pokémon is related to .
* Ash has another with Gladion and loses.
* is revealed to know .
Night of a Thousand Poses! 	
* becomes unable to touch any Pokémon again after encountering Gladion's Silvally.
Mission: Total Recall! 	
* resigns as s and leaves .
* Gladion's Silvally breaks free of its mask, revealing .
* remembers the incident that made her afraid of touching .
* Lillie overcomes her fear, becoming able to touch all Pokémon once again.
Faba's Revenge! 	
* manages to kidnap .
* , , , and meet for the first time.
* Nebby evolves into .
* Faba summons a through an Ultra Wormhole.
* protects her children from Nihilego, causing it to take her into the Ultra Wormhole.
Family Determination! 	
* changes her outfit.
* Lillie and leave for Poni Island together to look for a way to save .
* , , and decide to follow Lillie and Gladion to Poni Island.
* Ash visits Poni Island for the first time.
* Ash encounters the guardian deities of Ula'ula Island and Poni Island, and , for the first time.
Revealing the Stuff of Legend! 	
* is revealed to own a .
* evolves into and learns .
* obtains a Solganium Z from Nebby.
* The upgrade Ash's Z-Ring into a Z-Power Ring.
* Ash and Nebby perform for the first time.
* Ash, , and enter an Ultra Wormhole with Solgaleo in search of .
Rescuing the Unwilling! 	
* , , and arrive in Ultra Deep Sea and find there, only to discover she has with .
* Kiawe's Marowak is revealed to know .
* Ash and his friends battle Lusamine.
** Lusamine is revealed to own a , a , a , a , and an .
** splits from the group to battle Lusamine's Salazzle and wins.
** , , and , along with and , split from the group to battle Lusamine's Milotic, Lilligant, and Mismagius.
** Gladion splits from the group to battle Lusamine's Absol.
** , along with , split from the group to battle Lusamine's and free her from Nihilego's control.
10,000,000 Reasons to Fight! 	
* 's Electrium Z temporarily changes into a Pikashunium Z.
* Ash and perform for the first time.
* Ash and Pikachu defeat , freeing her and her Pokémon from 's control.
* Ash, , , Lusamine, and return to their own .
The Professors' New Adventure! 	
* is revealed to have returned to the .
* switches back to her original clothing.
* proposes to , and she accepts.
* and learn that Professor Kukui owns a .
* Professors Kukui and Burnet get married.
* , Wicke, and invite Ash and his classmates to join the "Ultra Guardians" task force to deal with any future incidents, which they accept.
The Dex Can't Help It! 	
* uses and for the first time.
Fighting Back the Tears! 	
* James tries and fails to a .
* James tries to , but Mareanie chooses to stay with him.
Tasting the Bitter with the Sweet! 	
* and recall how they first met each other.
Getting a Jump on the Competition! 	
* visits Ula'ula Island for the first time.
* Hala's evolves into .
* Snowy is revealed to know and learns .
A Mission of Ultra Urgency! 	
* A emerges from an Ultra Wormhole and starts following Ash's Pikachu.
* and go on their first Ultra Guardians mission.
* is updated with data about the known .
* The Ultra Guardians a and it back into Ultra Space.
Acting True to Form! 	
* James is revealed to own a Great, Ultra, Premier, Dusk, Heal, and Quick Ball.
* learns that they need a Z-Ring in order to use their Darkinium Z.
* An joins Team Rocket and travels to the in Kanto, where it is appointed as Matori's assistant.
Pushing the Fiery Envelope! 	
* learns about Battle Royals and the .
* Professor Kukui is revealed to own an , a Z-Ring, and an Incinium Z.
* Ash participates in his first-ever Battle Royal with the Masked Royal, , and , with the Masked Royal winning.
* Ash's starts to learn .
* Ash's Litten evolves into and masters Flame Charge.
* Ash has a Single Battle with the Masked Royal and loses.
Turning Heads and Training Hard! 	
* and meet Ilima, a Pokémon School graduate, for the first time.
* invites Ilima to attend the Alola League after it is completed, and Ilima accepts.
* Ash challenges Ilima to a , but they are interrupted by the arrival of Team Skull before the battle can properly begin.
Smashing with Sketch! 	
* Ilima heads back to Kalos.
Love at First Twirl! 	
* The recurring is revealed to know .
* and meet the recurring Poipole for the first time.
* Ash to take care of it until the location of its Ultra Wormhole is discovered.
Rise and Shine, Starship! 	
* and go on their second Ultra Guardians mission.
* The Ultra Guardians try and fail to capture a , due to it being rooted down at the time.
* The Ultra Guardians help free the Celesteela from being trapped underground, allowing it to fly back to space.
The Young Flame Strikes Back! 	
* Kiawe's Marowak performs for the first time.
Sours for the Sweet! 	
* and meet Ulu, 's older brother, for the first time.
Why Not Give Me a Z-Ring Sometime? 	
* James's Mareanie learns .
* receives a Z-Power Ring from Nanu.
* James and Mareanie perform for the first time.
* Jessie receives a Mimikium Z from Acerola's .
* heads to Ula'ula Island to participate in his third grand trial.
Tough Guy Trials! 	
* is revealed to have told and about the Pokémon League he's establishing in Alola.
* Ash arrives at Ula'ula Island and meets island kahuna Nanu and Acerola for the first time.
* Ash and learn about the legend of the "".
* Ash's Lycanroc goes berserk again.
* Ash battles Nanu and loses.
* Acerola agrees to help Ash train for a rematch with Nanu.
Some Kind of Laziness! 	
* Ash's Rowlet learns .
* learns the pose for .
* Ash's Lycanroc overcomes its habit of going berserk whenever its fur gets wet or dirty.
* Ash's Lycanroc learns .
A Battle Hand-Off! 	
* Jessie's Mimikyu is revealed to have as its Ability.
* Jessie and Mimikyu perform for the first time.
* Ash's Pikachu learns .
* 's Electrium Z temporarily changes into a Pikashunium Z again.
* Ash clears the trial, becoming qualified to challenge Nanu's grand trial.
Guiding an Awakening! 	
* Ash's Lycanroc is revealed to have gained control of its red-eyed state, allowing it to be used as a temporary power boost.
* Ash's Lycanroc learns .
* battles Nanu in the Ula'ula Island grand trial and wins, earning a Lycanium Z as a reward.
* Ash leaves Ula'ula Island and returns to Melemele Island to rejoin .
Twirling with a Bang! 	
* and go on their third Ultra Guardians mission.
* Ash and perform for the first time.
* The Ultra Guardians a and a and them back into Ultra Space.
Showering the World with Love! 	
* and travel to Ula'ula Island to visit Hokulani Observatory.
* Ash, , , , and meet 's cousin, Molayne, for the first time.
Not Caving Under Pressure! 	
* receives an Icium Z from a .
* gives Lillie an Ice Stone found by his .
* Lillie offers the Ice Stone to Snowy, but it refuses to evolve for the time being.
* Lillie decides to keep the Ice Stone in case Snowy changes its mind.
* and travel back to Melemele Island.
A Young Royal Flame Ignites! 	
* Ash's Torracat learns .
All They Want to Do is Dance Dance! 	
* 's learns , evolves into , and learns .
The Shape of Love to Come! 	
* Ash's Poipole is revealed to know .
* and meet Mina for the first time.
* Ash uses Poipole in an unofficial for the first time.
The Long Vault Home! 	
* and go on their fourth Ultra Guardians mission.
* The Ultra Guardians a and it back into Ultra Space.
Filling the Light with Darkness! 	
* A small Ultra Wormhole opens above the Altar of the Sunne, covering Alola with dark clouds and draining the region of its Ultra Aura, causing all adults to lose their energy and motivation, and draining Z-Moves of their power.
* learns about the Manalo Festival.
* A special Team Rocket unit led by Matori, called the "Matori Matrix", heads to Alola on 's orders.
* Ash and go on their fifth Ultra Guardians mission.
* The Ultra Guardians travel to the Altar of the Sunne.
* is revealed to have joined the Ultra Guardians and acquired a Z-Power Ring.
* A appears from the Ultra Wormhole above the Altar of the Sunne, followed by .
Full Moon and Many Arms! 	
* The Ultra Guardians follow and to Melemele Island to protect the former from the latter.
* Necrozma fuses with Lunala.
* Team Rocket's Matori Matrix attempts to capture Necrozma, but fails.
* appears through an Ultra Wormhole and helps Lunala separate from Necrozma.
* Nebby uses for the first time and is revealed to have learned .
* The Matori Matrix attempts to capture Nebby and Lunala, but are stopped by and .
* Necrozma fuses with Nebby and escapes through an Ultra Wormhole, stopping its absorption of Alola's Ultra Aura, resulting in the recovery of the energy and motivation of the region's adults.
* Lunala is brought to the Ultra Guardians base to recover.
* The Aether Foundation, considering Necrozma an Ultra Beast, gives it the codename "UB Black".
* informs the Aether Foundation and the Ultra Guardians about the Team Rocket group that is trying to capture Nebby and Lunala.
* Using the Z-Power of Ash, , , and Gladion's Z-Rings, Lunala is able to restore itself.
The Prism Between Light and Darkness! 	
* The Ultra Guardians travel to 's home world through an Ultra Wormhole created by .
* The Ultra Guardians learn 's real name and its connection to Poipole's home world.
* reveals that Ash's Poipole came to Alola to find a better place for it and its hive to live.
* and confront the Matori Matrix and start battling against Gozu at Ten Carat Hill.
* is revealed to have obtained a Normalium Z.
* , , , and Gladion each use a Z-Move in a combined attack to release from Necrozma's absorption and to give Necrozma enough Ultra Aura to turn it back into .
Securing the Future! 	
* The Ultra Guardians' attempt to make separate from by using their Z-Moves fails, as it instead absorbs the Z-Power to power itself up.
* defeats Gozu, but at the cost of revealing to that he is the Masked Royal.
** Professor Kukui asks Faba to keep his identity a secret from his students.
* The Matori Matrix attempts to travel to Ultra Space through an Ultra Wormhole, but are stopped by , forcing them to retreat.
* Necrozma reverts to its normal form, thus separating from Nebby, after it gathers the light sent to it by the Ultra Guardians, their Pokémon, and all of the people and Pokémon of Alola.
* receives a Lunalium Z from .
* and Gladion perform and , respectively, to give Necrozma enough Ultra Aura and revert it to its original .
* Necrozma brings the light back to 's home world, restoring it to its former state.
* Poipole chooses to stay in its home world, so Ash .
* The Ultra Guardians, Nebby, and Lunala return to Alola.
A Haunted House for Everyone! 	
* 's meet Acerola for the first time.
* Acerola is revealed to own a .
Sparking Confusion! 	
* and go on their sixth Ultra Guardians mission.
Don't Ignore the Small Stufful! 	
* Jessie tries and fails to a that starts to follow her around.
* is revealed to be Stufful's mother.
No Stone Unturned! 	
* meets Hau for the first time.
* Ash has a against Hau and loses.
* Ash tries to teach , despite it being unable to learn the move.
** Rowlet finds an Everstone, which it learns to use with instead.
* Ash has a rematch against Hau and wins.
Bright Lights, Big Changes! 	
* tries and fails to .
We Know Where You're Going, Eevee! 	
* and meet the recurring for the first time.
* Lana's Popplio learns .
* Eevee is revealed to know .
* nicknames the Eevee "Sandy" and it with a Dive Ball.
Battling the Beast Within! 	
* and have another rematch with , but the is interrupted when Ash and Pikachu are transported to the Ultra Ruin.
* Ash encounters a .
* Ash meets a named and his partner, .
Parallel Friendships! 	
* and stop the by sending it through an Ultra Wormhole.
* Ash and return to Alola by Dia and .
Alola, Alola! 	
* and visit the Alola region for the first time.
* and reunite with Misty and Brock, as a surprise organized by .
* Snowy is revealed to know .
Heart of Fire! Heart of Stone! 	
* is revealed to have received a from the Melemele Island Nurse Joy in the previous episode.
* Brock and meet Olivia for the first time.
* Brock's Sudowoodo is revealed to have learned and .
* Brock and Olivia have a , which is interrupted by .
* Brock and Misty head back to Kanto.
That's Some Spicy Island Research! 	
* and travel to Poni Island.
* leaves his students in the hands of Poni Island's Nurse Joy before heading back to Melemele Island.
* reveals that he is planning to evolve his and learns that he can do so in Vast Poni Canyon.
* Ash learns that Poni Island doesn't currently have an island kahuna, as the previous one retired due to ill health, so he decides to find and battle for his grand trial instead.
* Ash and his classmates meet Hapu for the first time.
* Ash has a with Hapu and loses.
* Ash and his classmates learn that Hapu is the granddaughter of the Island's second-most recent kahuna, Sofu.
* Ash meets Plumeria, the Admin of Team Skull, for the first time.
Showdown on Poni Island! 	
* Hapu is revealed to be planning on becoming Poni Island's next island kahuna.
* and meet again.
* Gladion reveals that he is planning to take on the Poni Island grand trial by battling .
* Gladion also reveals that he wishes for Tapu Fini to let him meet his and Lillie's father, who is believed to be dead.
* Lillie challenges Gladion to a , which he accepts, but Ash accidentally interrupts it before it can begin.
* Gladion is revealed to have obtained a Dragonium Z.
* Ash battles Gladion and loses.
Evolving Research! 	
* , , and meet Ida again, while , , and meet her for the first time.
* Ida's is revealed to have evolved into .
* Sophocles, Ash, and Kiawe meet Horacio again.
* Sophocles's evolves into .
* Lana's evolves into .
* Lana receives a Primarium Z from Ida.
Run, Heroes, Run! 	
* Kiawe's Charizard is revealed to know , , and .
* clears a trial set up for him by , receiving a Flyinium Z from it as a reward.
* Kiawe and Charizard perform for the first time.
Memories in the Mist! 	
* and find out that the old man they met in the previous episode was Hapu's dead grandfather, Sofu.
* Mallow's Bounsweet is revealed to have been a to her from her mother.
* Ash's Torracat briefly reunites with its mentor , who is confirmed to have passed away.
* Ash's Torracat learns .
* accepts Hapu as the new kahuna of Poni Island.
* befriends a , who agrees to stay with her until it has to fly away.
* and learn that their father is still alive somewhere, and Gladion leaves to inform .
A Grand Debut! 	
* Hapu officially becomes the new island kahuna of Poni Island.
* battles Hapu in the Poni Island grand trial and wins, clearing his final grand trial in Alola.
* Hapu offers Ash a type-specific Z-Crystal of his choice as his prize. picks the Steelium Z.
* Ash and reunite with and return to Melemele Island.
Keeping Your Eyes on the Ball! 	
* and meet Kahili for the first time.
Show Me the Metal! 	
* , , and encounter a .
Got Meltan? 	
* a .
Beauty is Only Crystal Deep! 	
* and go on their seventh Ultra Guardians mission.
* The Ultra Guardians a and it back into Ultra Space.
The Dealer of Destruction! 	
* and perform for the first time.
* officially announces the first-ever Alola League, whose winner will become Alola's first-ever .
* The is revealed to be held at a yet-to-be-completed stadium near Aether Paradise.
* Ash, , , , and decide to participate in the Alola League, while and consider doing so too.
* Ash, , and Team Rocket meet the Team Skull Boss Guzma for the first time.
* Ash's classmates and Team Rocket meet Plumeria for the first time.
* Team Rocket has a with Guzma and is defeated.
* Ash has a battle with Guzma, but the battle ends when Guzma's activates its Ability.
The Secret Princess! 	
* The Aether Foundation begins to search for Mohn.
* finds a Z-Ring that used to belong to her father and decides to use it until he's found.
* Lillie discovers an inactive at her house, bought for her by her father, and sets out to restore it.
* Lillie and Snowy try to perform for the first time, but fail.
Drawn with the Wind! 	
* and travel to Malie City.
* is revealed to have left with her father for the duration of the Malie City trip.
* Ash's Meltan is revealed to know .
* is revealed to know .
* Ash and his classmates learn about the Kantonian Gym and decide to visit it.
Aiming for the Top Floor! 	
* and visit the Kantonian Gym and meet Ryuki for the first time.
* battles Ryuki and loses.
* Ash's Meltan is revealed to know .
* Ash's Rowlet learns .
* Ash battles Ryuki and wins.
* Ash and his classmates return to Melemele Island.
A High-Speed Awakening! 	
* , , and meet Horacio again, while , , and meet him for the first time.
* Horacio's is revealed to have evolved into .
* Sophocles participates in a Vikavolt race and wins, earning a Buginium Z as a reward.
* Sophocles receives a Z-Ring from Hapu.
The One That Didn't Get Away! 	
* is revealed to have received a fishing lure from .
* Lana's evolves into .
A Recipe for Success! 	
* clears a trial set up for her by and receives a Grassium Z from as a reward.
* Mallow receives an old Z-Ring from Oranguru, which Olivia cleans up and repairs before giving it back to her.
Spying for the Big Guy! 	
* Jessie and James try and fail to and Grandpa Forest, respectively.
A Fiery Training Camp Trick! 	
* and perform for the first time.
** In the process, Primarina is revealed to have learned .
* and agree to participate in the upcoming Alola League.
* Sophocles's Vikavolt is revealed to have learned .
* reveals how he met his .
* and Vikavolt perform for the first time.
Living on the Cutting Edge! 	
* The are revealed to be multiplying.
* and go on their eighth Ultra Guardians mission.
* The Ultra Guardians attempt to a , but fail as it slices the Beast Ball to pieces.
* Kartana opens itself its own Ultra Wormhole, allowing it to return home.
A Timeless Encounter! 	
* is revealed to own a Firium Z.
* Using Kukui's Firium Z, and perform for the first time.
* Ash inspires a young Professor Kukui to create the Alola League in the future.
* Ash receives his own Firium Z from a .
Chasing Memories, Creating Dreams! 	
* battles Hapu in the Poni Island grand trial and wins, clearing his final grand trial.
* The construction of Manalo Stadium is completed.
* and try to perform for the first time, but fail.
* Lana's Primarina masters , using the move for the first time onscreen in the process.
* Sophocles's Vikavolt is revealed to have learned .
* reveals that the winner of the Alola League will face the Masked Royal in an .
* and Snowy successfully perform for the first time.
* Gladion finds Mohn's missing and asks it to join him in his search for his father, which Zoroark agrees to.
League Offenders and Defenders! 	
* and arrive at the Manalo Stadium.
* Ash meets up with Hau again, while Ash's classmates meet Hau for the first time.
* Hau is revealed to have completed the Melemele Island grand trial and obtained a Z-Ring and Z-Crystal.
* Hau's is revealed to have evolved into a .
* Ash and his classmates learn the history behind and Guzma's relationship.
* and Hau meet each other for the first time.
* Ash, his classmates, Jessie, James, Samson Oak, Gladion, Ilima, Guzma, Plumeria, and Hau all enter the Manalo Conference.
Battle Royal 151! 	
* The Manalo Conference begins.
* Sophocles's Togedemaru is revealed to have learned .
* Plumeria is revealed to own a .
* Guzma is revealed to own a .
* , , Jessie, James, , Hau, , Ilima, Acerola, Mina, Guzma, and Samson Oak make it through the Battle Royal preliminary round.
* Hau is revealed to own an .
* The match-ups of the first round are revealed to be:
** Ash versus Faba
** Ilima versus Guzma
** Hau versus Samson Oak
** versus 
** versus Mina
** Jessie versus James
** versus Acerola
** versus Gladion
Battling Besties! 	
* defeats , advancing to the second round.
* Ilima is revealed to own a , a Kangaskhanite, and a Key Stone.
* Guzma defeats Ilima, advancing to the second round.
* Samson Oak is revealed to own an .
* Hau defeats Samson Oak, advancing to the second round.
* Lana's Primarina is revealed to have learned .
* and successfully perform for the first time.
* defeats Mallow, advancing to the second round.
The Battlefield of Truth and Love! 	
* defeats Mina, advancing to the second round.
* James defeats Jessie, advancing to the second round.
* Acerola is revealed to have the .
* defeats Acerola, advancing to the second round.
* Snowy is revealed to have as its Ability.
* defeats , advancing to the second round.
* The match-ups of the second round are revealed to be:
** Gladion versus James
** versus Hau
** Kiawe versus Sophocles
** Guzma versus 
* asks a to bring its foster family to the Manalo Stadium.
Imitation Is the Sincerest Form of Strategy!	
* Ash's Rowlet begins to learn with the help of its foster family.
* defeats James, advancing to the semifinals.
* begins his second round against Hau.
* Hau is revealed to have obtained a Decidium Z.
Battling on the Wing! 	
* Ash's Rowlet masters .
* wins his battle against Hau, advancing to the semifinals.
* Ash's Meltan starts calling for to meet up with it.
* and begin their second round .
The Road to The Semifinals! 	
* Sophocles's Vikavolt is revealed to have learned .
* wins his battle with , advancing to the semifinals.
* Guzma defeats , advancing to the semifinals.
* Kiawe and are revealed to face and Guzma, respectively, in the semifinals.
The Final Four! 	
* begins his against in the semifinals.
* Kiawe's Turtonator learns .
Getting Down to The Ire! 	
* wins his battle with , advancing to the finals.
* begins his with Guzma in the semifinals.
The Wisdom Not to Run! 	
* wins his battle against Guzma, advancing to the finals to face .
* Guzma tries to disband Team Skull, but his choose to remain with him.
Final Rivals! 	
* , , and Mimey arrive at Manalo Stadium to watch 's in the Manalo Conference finals.
* The arrive at Manalo Stadium and reunite with Ash's .
* The wild Meltan with Ash's Meltan, causing it to evolve into and learn .
* Ash begins his battle with in the finals.
Enter the Champion! 	
* is revealed to have obtained a Ghostium Z.
* and Gladion's battle ends in Ash's victory, making him the winner of the Manalo Conference and the first of Alola.
* A appears from an Ultra Wormhole, interrupting the awards ceremony.
Z-Move Showdown! 	
* Two appear from two other Ultra Wormholes.
* is revealed to own a and an Electrium Z.
* 's returns, having evolved into a and learned .
* Using Kukui's Electrium Z, Naganadel performs for the first time.
* The three are defeated and sent back to Ultra Space.
* Ash discovers that the Masked Royal is Professor Kukui.
Exhibition Unmasked! 	
* 's identity as the Masked Royal becomes public knowledge.
* and Professor Kukui decide to make their a Full Battle.
* rejoins 's party.
* Ash begins his exhibition match against Professor Kukui.
A Full Battle Bounty! 	
* continues his against .
* Professor Kukui is revealed to own a and an .
* Ash uses his in an official for the first time.
* Ash's Naganadel is revealed to have learned .
Fiery Surprises! 	
* continues his against .
* Ash's Naganadel uses for the first time and is revealed to have learned and .
* Ash's evolves into .
* takes over as Kukui's final Pokémon in the match.
From Z to Shining Z! 	
* receives a Tapunium Z from .
* 's Electrium Z permanently transforms into a Pikashunium Z.
* Ash defeats Tapu Koko, winning his against Professor Kukui.
* The Manalo Conference ends.
Dreams of the Sun and Moon! 	
* Ash's Naganadel returns to its home world.
* reveal their dreams and holiday plans.
** plans to travel to Mossdeep City and visit the Mossdeep Space Center with Molayne.
** plans on finding a during an ocean survey with her father.
** plans to turn Aina's Kitchen into a restaurant where both humans and can eat.
** plans to restore .
** plans to continue his island challenge and eventually become an island kahuna.
* battles Kiawe and wins.
* Kiawe's Charizard performs for the first time.
* Magearna becomes active again.
* Ash decides to return to Pallet Town and begin traveling around the .
Thank You, Alola! The Journey Continues! 	
* , receiving an order from to return to the , and , leave their Z-Power Ring with them, say goodbye to and , and return to Kanto.
* returns to say goodbye to .
* decides to stay and work at Aether Paradise.
* leaves Alola along with and to search for Mohn with 's help.
* Ash returns to Pallet Town, leaving all the Alolan Pokémon in his team with and .
* heads to Mossdeep City with Molayne.
* leaves for the ocean survey to find with her father.
* turns into its by touching Gracidea flowers brought by Ulu, and leaves .
* Hau battles Nanu in the Ula'ula Island grand trial, but the end result is left unknown.
* Professor Burnet is revealed to be pregnant.
==Related articles==
* Timeline of events in Pokémon the Series
** The Beginning
** Gold and Silver
** Ruby and Sapphire
** Diamond and Pearl
** Black & White
** XY
** Journeys
* Timeline of events in Pokémon Horizons: The Series
Category:Pokémon animated series
Category:Lists