Sonic the Hedgehog 3 showed Carrey's comedic genius shine in two roles. The first was Dr. Ivo Robotnik, the evil "Eggman" and Sonic's arch-nemesis, who also appeared in the last two chapters.
while Shadowthe Hedgehog emerged from his slumber in a mid-credits sequence for Sonic 2. And as for the recently released Sonic3, that made it pretty clear [SPOILERS SPOILERS SPOILERS ...