Double Dungeons cheats and cheat codes for Nintendo Wii

Jump to front of The Last Boss Door:
Go to the password screen and enter the following password:

cHR0EScxgoAq (where the 4th letter is ZERO)
iky7ihOfeBGe (where the 7th letter is big O letter)

Beginning of Level 22:
Go to the password screen and enter 2R3KD4RG0J9D3YT0664LJ

End of Level 22:
Go to the password screen and enter YNzYSMChriGIgLV-ih0dfCGe

Get 65535 HP:
Enter either Player01 or Player 02 as a password, with the
remaining spaces filled in with either +'s or -'s.

Invincible Player Two:
Enter any working password for player one, then enter
KKKKKKKKKKKKKKKKKKKKKKKK as a password for player two.