Dr. Muto

Invincibility:
Enter NECROSCI as a code. Note: This has no effect when you fall from high places.
uoleb wr, elauiris.

Play as AL:
Enter CYBERDOC as a code. The message "Must I do everything myself, Doctor?" will appear to confirm correct code entry.
derrick dorsey.

Never take damage:
Enter CHEATERBOY as a code.

All Gadgets:
Enter TINKERTOY as a code.

Secret Morphs:
Enter LOGGLOGG as a code.

All Morphs:
Enter EUREKA as a code.

Go anywhere:
Enter BEAMMEUP as a code.

View FMV sequences:
Enter HOTTICKET as a code.

Super ending:
Enter BUZZOFF as a code.

Hint: Easy Isotopes:
Zap the television in Muto's house to get 10 Isotopes.
Dragonwarrior765.

Hint: Easy Vials:
In the junkyard, zap the dogs and vials will appear. Then, shoot them to get two more.
Mario.

Hint: Aquem: Shortcut:
On the Aquem level, there is a waterfall near the beginning. Walk through it, and you will find yourself at the end of that part of the level.
rudy ambrosi.

Hint: Junkyard: Health and producer picture:
Go to the Junkyard ending transloader. There are some pools of gook. Enable the "Invincibility" or "Never take damage" code. The car in the third pool sinks when you get on it. Once you get on it and it sinks, turn into a mouse. After the car comes back up, a picture of Bob appears along with some health bottles (not vials). Each one is worth five vials. Get the first two. Jump on Bob to get the last three.
Bilal Ayaz.

Hint: Flush the toilet:
To flush the toilet, zap it for a second until you hear a flushing noise.
Wrestle5263.

Glitch: On web on ground:
Get to the part when you are scaling a web as the spider morph trying to find the switches to open the force fields to three turrets to destroy the Gomatron. When you see a platform with SOBs, bungee attack them from the web. When you get to the ground you should be stuck where you are, and the enemies will interact with you there, However your eggs will go to the webbing that you were on.