User blog comment:Sonamyfan666/The dumbest thing by offical reviwers every said about a Sonic game./@comment-3437898-20120812034410/@comment-3437898-20120812035123

The chu -hu's are based off the one's that appear in the game. You could call them representatives of their color teams. They are still from that game and therefore they're appearance in Chu-Chu Rocket is the first appearance of the ones in Sonic and Sega All Stars Racing.