Super Mario Galaxy 2/Boss Blitz Galaxy

Star 1: Throwback Throwdown
When you land in this galaxy you stomp on a giant egg...

Boss 1 - Dino Piranha

When you crack his egg a tail with a club will appear from the egg. Spin attack this tail to crack the egg. The first boss battle has officially begun! Dino Piranha will start to chase you. Quickly swerve around him and spin his club which will rebound and strike his head. Now Dino Piranha will be enraged. There is no difference in battle except he is a bit faster

When you finish this level, a Green Luma will appear on Starship Mario.

Star 2 (Prankster Comet): Throwback Throwdown Speed Run
Repeat Star 1 within a time limit of 5 minutes.