The Chaotix are a group of fictional characters in the Sonic the Hegehog series of video games. They debuted in the game Knuckles' Chaotix (simply called Chaotix in Japan). The group, or individual members in it, has since appeared in Sonic the Fighters, Sonic Heroes, Shadow the Hedgehog, Sonic Rivals 2, and Mario & Sonic at the Olympic Games. The character Mighty actually made his debut appearance prior to Knuckles' Chaotix, in SegaSonic the Hedgehog.