Scaler Cheats for GameCube

Successfully complete the game in 'Normal' difficulty setting collecting ALL 100 Crystals on each level. Then hold L + R at the 'Title' screen and press Z to unlock hard mode.

Pause game play and select 'Options' then select the 'Audio' menu and enter the code A sound will confirm correct entry.
Full Health:
R, L, R, L, Y(x2), X(x2), R, X
Unlock 200,000 Klokkies:
L(x2), R(x2), Y, X, Y
Unlock Infinite Electric Bombs
R(x2), L(x2), Y(x2), X
Unlock Alternate Ending:
Collect ALL 100 Crystal Gems from the 10 levels.