Pee-Wee Pirahna
Pee-Wee Pirahna is fought in the Sky Station Galaxy. To fight him Mario must break the egg on the back of Pee-Wee Pirahna. When the egg is gone hit his rear which will send him flying off. The video of the battle is on the extras page. Like a lot of Mario games you fight a Pirahna on the first level. On Super Mario Galaxy you fight Dino Pirahna on the first level. And on Super Mario Sunshine you fight Petey Pirahna on the first level.