Omochao

Omochao (オモチャオ ?) is a robotic Chao with a propeller on its head. Omochao was introduced in Sonic Adventure as part of the Chao Races, and it later appeared in Sonic Adventure 2, where it serves as an in-game manual to teach players how to play the game. Since then, it has appeared in a multitude of Sonic games, such as a guide in the training level and instructions for what everything does in Sonic Heroes, or as a type of gun in Shadow the Hedgehog, a referee in Sonic Riders, a collectable card, and referee in Sonic Rivals 2, a referee in Mario and Sonic at the Olympic Games, giving hints in Sonic Advance 3, and as a supporting character in multiplayer of Sonic and the Secret Rings. He has also been seen as the host of the World Grand Prix in Sonic Free Riders. He also appears in Sonic Generations as an optional gameplay guide. "Omochao" is a pun on "omocha" (玩具 ?, toy) and "chao"