When performed, Wario opens his jaws wide and leans forward, trying to bite someone. If Wario catches someone, he will trap the opponent in his mouth to chew them when the special move button is pressed, which can be done up to two times, and deal 2% damage to the opponent each time. He'll spit the opponent out forwards or backwards, depending on what direction is pressed, before spitting them out and dealing 6% to the opponent. Wario will bite at the end of the move if he does not grab any opponents in time, which will deal 10% damage and good knockback to opponents bitten.
When Kirby uses the move after copying it from Wario, he uses Wario's voice clip in addition to his own.
Prior to v0.8a of the SSF2 Demo, Wario's standard special move was instead Wario Bike. It was changed to Chomp to be in line with his official Super Smash Bros. moveset, as well as the fact that the Wario Bike was deemed to be annoying, glitchy, overpowered, and easily abused.