Stage 1 boss trick
When fighting the Stage 1 boss, stand just left of the center of the
screen and wait for about two minutes, and it will explode on its own.
Passwords
276 P3RF 7V7 Stage 3
44! PN22 LN0 Stage 4
DH4 GQCC BN7 Stage 5
8K6 3CR1 739 Stage 6
94J LZH3 93G Stage 7
H0N NTQ3 FZR Stage 1 on the second quest.