Cheats
Chapter 4: Sub-C Frequency

Baboo shares Dr. J's last words: "Tell Mike to dip my letter in water...."

This is referring to the physical copy of the letter that came with the instruction manual, which when wet reveals:

Mike

I found some strange ciphers in my last voyage. Since then, someone has been watching me! I put a tiny transmitter in my shoe.

Its frequency is 747 MHz.

Perhaps I worry too much, but better be safe than sorry.

Chapter 5: Captain Bell's Organ

After feeding Peter a fresh worm, he gives Mike the solution to Captain Bell's organ puzzle: "Do me so far, do me".

If you assume the keys are numbered from left to right, Mike must step on them in this sequence: 1, 3, 5, 4, 1, 3.

Doing so will cause the fires to extinguish, allowing Mike to pass through.


Game Genie Codes
Infinite lives SXETAKVK
1 life with a new character PASTYZLA
6 lives with a new character TASTYZLA
1 life after continue PAUTGILA
6 lives after continue TAUTGILA
Infinite weapons SUXXPSVS
Gain 50 fire weapons on pick-up ZUVLZEPP
Gain 50 bat weapons on pick-up ZUSUYETP
Only 3 hearts needed to use shooting-star IEUZZNGA
Only 8 hearts needed to use super-nova AEOZPYTO
Infinite energy SZNZGPAX + VZVZLOSV
Only 1 star needed to restore energy PEXXYTIA + PEUZLTIA
9 stars needed to restore energy PEXXYTIE + PEUZLTIE