Omochao is an attack used by the Chao Walker in Sonic Adventure 2 and its sequel Sonic Adventure 2: Battle. When using this technique, the Chao Walker fires a projectile at its opponent. It is the equivalent to Tails' Propeller Punch and Dr. Eggman's Punch.
The Omochao can only be performed in the games' two-player mode when playing as the Chao Walker. In gameplay, the Omochao can deal significant damage to an opponent. To use in gameplay, the player must press the Action Button when an enemy is in front of the Chao Walker.