Play as enemy Mech:
Press Down, A, X on the Tiburon screen, and enter XTRM3K as a password.

Unlimited ammunition:
Enter M1R0G3 as a password.

Invincibility:
Enable the "Unlimited ammunition" code and each of the five level passwords. Then, enter MKWFLL as a password.

Level	Password
1	BMBRMN
2	65C816
3	B1GBND
4	FSPRNG
5	YHWX11