Men in Black - Platform: Gameboy Color
 
Cheat mode
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Enter 0601 and ignore the invalid password message. 
Press Start to return to the command center. Begin game 
play and hold Select +Up to move up vertically. Press 
Left or Right to move in that direction, or Select + Down 
to move down vertically. Hold Select + A to obtain the Noisy 
Cricket super-gun. A lightning bolt will appear next to the 
number of lives remaining to confirm correct code entry. 

Level skip
----------
Enter 2409 as a password and begin a new game. Pause game 
play and press Select to advance to the next level. Pause 
game play and press A to advance to the next stage within 
the current level. 

View ending sequence
--------------------
Enter 1943 as a password.

Hint: Bazooka
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Begin game play, then before a shot, pause, resume, pause, 
resume, then hold Jump down for approximately one minute 
before shooting. If done correctly, the shot will be more 
like a missile.

Level Location  Password
------------------------  
2 Manhattan  2710 
3 Sewers 1807 
4 Aerodrome  0309 
5 Rooftops  2705 
6 Forest 3107