Men In Black: The Series Codes -

Invincibility:
Enter LVFRVRDD as a password.

All weapons:
Enter LLWPNSDD as a password.

Unlimited ammunition:
Enter NFNTMMDD as a password. Note: This also unlocks the game's ending.

Episode	Name	Password
1	MIB Headquarters	(none)
2	Forest Landing site	FCHTRMNS
3	Alien Technology Lab	HSDSHSBS
4	Rocket Silo	MXNMSNNG
5	MIB Safehouse	THXBXSCK
6	Halloween In Manhattan	NNTNDWNY
End	Ending	NFNTMMDD