Double Dungeons - Beginning of Level 22

End of Level 22:
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.

In Front of The Last Boss Door
At the password screen carefully enter the following password:

cHR0zeroEScxgoAq
iky7ihOletterfeBGe

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