CANNON SPIKE TIPS & TRICKS
Alternate costumes
Highlight Cammy and press Up or Down at the character selection screen.
Bonus levels
Choose difficulty four or higher and Finish the game without losing any lives. Another set of levels with a higher difficulty will be unlocked.
Gallery Art option
After finishing the game under any difficulty as various characters you will unlock the entries in the gallery option.
Mega Man and B.B Hood
Finish the game as any character under any difficulty. Press Left or Right at the character selection screen until Mega Man and B.B Hood appear.