All Bosses in comic costumes
Go to the "Costumes" options and select the blank spit under the "Movie Boss" selection.
Alternate costumes
Complete the indicated task to unlock the corresponding costume for use at the "Costumes" menu.
Army Clothing: Complete level 2.
Classic Blue And Yellow Wolverine: Collect all comics from Series 1.
Movie Jacket: Complete level 4.
Ultimate X-men Wolverine: Collect all comics from Series 4.
Weapon X Wolverine: Complete level 1.
X-Men Movie Trilogy Suit: Defeat Victor Creed during the prologue of level 1.
Yellow/Orange And Brown Suit: Collect all comics from Series 2.