This is an episode of Le Soopy Wawioh Bwothurs Wah-wah Show! Baby talk?
Knuckles: Yes, you're fat.
Wario: AAAAAAAUGH! THAT'S IT! YOU WILL FACE THE WRAAAATH OF... My booty. (shakes his booty)
Waluigi: Shouldn't have done that.
Knuckles: No kidding.
Wario: (eats Knuckles, burps, and explodes) Yummy. Also, why the fish did I shake my butt? (goes back in time and stops himself from doing the stupid butt shake thingy) SUCCESS!