Play through the game to unlock T-Shirts for Playstation Home.

Shirt	How to unlock
Mega Man Shirt	Beat the game with Megaman.
Proto Man Shirt	Beat the game with Protoman.
Black Mega Man + Proto Man shirt	Achieve Rank B in Challenge mode (at least 75% completed)
Mega Man and Roll Shirt	Achieve Rank A and complete 90% of the challenges
Yellow Bass T-shirt	Beat the game with Bass.