Cannon Spike Cheats

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.