Mega Man Zero 2
Hard difficulty setting:
Successfully complete the game. Then, highlight the "New Game" option and hold
L + A. A sound will confirm correct code entry.
Graphics gallery:
Successfully complete the game under the hard difficulty setting. Then, highlight
the "New Game" option and hold Select + L + A. A sound will confirm correct code
entry.
Alternate Zero armors:
Successfully complete the game under the easy, normal, and hard difficulty
settings. Then, press Start and press L or R until you get to a menu with Zero's
helmet with a different color. There are pink, black, and red versions.