Bomberman 2 (NES)

CheatingDome.com

Sound Test

Enter K3456712 as a password. Press Up or Down to select the various options, A to select sounds, and Start to play the sounds.

Various Passwords

Select "Continue" on the "Game Select" screen.

EffectPassword
Start at final level with max bomb explosion length and max bombs on-screen at a time1F4441G1.
Start with max bomb explosion length and max bombs on-screen at a time111K41G1.