Level Select Select "Story" or "Team" mode, then hold C-Left + C-Right + C-Up + C-Down + R and press Right, Up, Left, Down when the level number is displayed. (Thanks to HAROKoRn13@aol.com)

Extra Difficulty Level At the Kemco logo, hold L + R + C-Up and press C-Right, C-Left, B. Then, a "Super Hard" difficulty setting will be available. (Thanks to HAROKoRn13@aol.com)