Unlock the Last Boss

Use "Betty, X-5, The Cameleon, Red Robot" as password at the Password screen.
Level Passwords

Enter the following passwords under "Continue" under "Play" at the Main Menu screen:
Level 2 - Red Robot, X-5, Atomic Betty, Minimus
Level 3 - Chameleon, Gray Robot, Gray Robot, Maximus
Level 4 - Minimus, Red Robot, X-5, Gray Robot
Level 5 - Betty, Gray Robot, Chameleon, Sparky
Level 6 - Red Robot, Betty, X-5, Sparky
Level 7 - Maximus, Chameleon, Maximus, X-5
Level 8 - X-5, Maximus, Maximus, X-5
Level 9 - Gray Robot, Minimus, Betty, Chameleon
Level 10 - X-5, X-5, Red Robot, Minimus
Level 11 - X-5, Maximus, Maximus, Gray Robot
Level 12 - Minimus, Sparky, Betty, Maximus
Level 13 - Betty, Chameleon, Betty, Chameleon
Level 14 - Gray Robot, Minimus, Betty, Maximus
Level 15 - Gray Robot, Betty, X-5, Chameleon
Level 16 - Gray Robot, Chameleon, Chameleon, Maximus
Level 17 - Chameleon, Chameleon, X-5, Maximus
Level 18 - Minimus, Minimus, Chameleon, Chameleon

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