Petey piranha is a mutated piranha plant that wears polka-dot pants. He is a boss in most of his appearences.
Petey is a minor boss in Bowser's Adventure. He starts out the battle by flying up into the air. He must be shot down by Iggy. Lemmy must then place a bomb under him. The bomb will explode and reveal his weak spot. His weak spot must be hit with Bowser's fire breath. He must be hit three times to beat him. Ludwig is rescued by beating him.
Petey Piranha will appear in Bowser's Story as a playable character.
- Petey was going to be a boss in Super Mario Moose, but he was replaced by the Koopalings.