Tails Doll

During the events of the first game, Tails Doll uses his illusion powers to trap Sonic in a nightmarish scenario. In this illusion the illusion variant of Sonic travels through a graveyard, seeing all of his deceased friends. After continuously playing with Sonic's mind, Tails Doll finally faces off against Sonic, summoning spikes above him as Sonic flies upwards due to the gravity alteration and falling into his open grave. Tails Doll resurrects Sonic as Sonic.exe, his henchman. Tails Doll allows Sonic.exe to travel to the regular Sonic's dimension and watches his progress as he murders Sonic's friends, and assists him along the way. Tails Doll even goes out of his way to kill Cream the Rabbit.

Sonic finally breaks free of Tails Doll's illusions and chases both Tails Doll and the newly brought to life Sonic.exe down. After Sonic faces off against Sonic.exe, the two vanish. However, it is confirmed that both of these are illusions of Tails Doll and Sonic.exe.

### Sonic Fear 2

Prior to the events of the first game, Tails Doll had broken into Eggman's base and corrupted Metal Sonic's coding. Although Eggman manages to escape, Tails Dolls' projected illusions makes it appear as though Metal Sonic turns him against Eggman and kills him, as well as some of Sonic's other friends.

Taking place prior to Sonic breaking out of Tails Doll's illusions from the first game, Tails Doll, Sonic.exe and Metal Sonic proceed to torment Sonic with duplicates of themselves. Tails Doll manages to imprison Sonic in Marble Zone and challenges him to escape with his army of copies. Once Sonic finds the real Tails Doll the two face off and Tails Doll drops a Chaos Emerald upon his defeat.

After Sonic defeated the illusions of Tails Doll and Sonic.exe, all three villains appear in the flesh They escape to the Wing Fortress as Metal Sonic begins his final transformation into Metal Overlord. Tails Doll and Sonic.exe abduct Tails and Knuckles as Sonic faces off against Metal Sonic. Once he is near the brink of destruction, Sonic.exe and Tails Doll teleport Metal Sonic away and prepare to repair him and get their revenge.

### Sonic Fear 3

Sonic.exe and the Tails Doll are stuck within their dimension and plan on once again travelling to Sonic's world using a portal until Sonic arrives. He is held back by Eggrobo and Metal Knuckles as they activate the portal, allowing Sonic.exe and Tails Doll to come through and start chasing Sonic and eventually teleport themselves to parts unknown. After finally getting Sonic out of their way, Tails Doll and his army have managed to take over a large portion of the world. After finding Dr. Eggman, Tails uses his powers to teleport Tails away from Sonic and shows him the various zones his friends are trapped in. Throughout the game, Tails Doll appears to help Metal Sonic, Eggrobo, Metal Knuckles and Sonic.exe by bestowing his powers upon them, but they are no match against Sonic and his friends.

After his teammates' defeats, Tails Doll opens a portal, letting in spirits from another dimension to come into Sonic's world. Tails Doll corners Sonic and reveals his origins, and that he was created by Dr. Eggman and gained sentience, as well as demonic abilities. He went rogue and was sent to another dimension by the doctor using the Chaos Emeralds, which started the events of the first game. Tails Doll battles Sonic and transforms into a giant, but fails to kill Sonic. Sonic and his team find the Chaos Emeralds and the Master Emerald, but Tails Doll regains consciousness and destroys his lair as he begins transforming into his monster form.

Sonic and his friends hunt for the Chaos Emeralds as Tails Doll tries numerous times to hinder their progress by trying to kill them. Tails Doll grabs Sonic and severely injures him, Amy finds the last Chaos Emerald and uses it to heal Sonic and turn him into his super state, he shares the chaos energy with Tails and Knuckles so that they can face off against Tails Doll for the last time. Tails Doll is eliminates Knuckles and Tails by stripping them of their super forms, but is still no match for Super Sonic, who charges into Tails Doll at full speed, undoing his corruption and finally destroying him for good.