Elevator Action EX

Elevator Action EX is an action game released for the Game Boy Color, and a remake of the Game Boy version of Elevator Action. In North America, the game was released in September of 2000 by BAM! Entertainment under the name Dexter's Laboratory: Robot Rampage. That game plays identically, with the graphics being replaced by characters from the cartoon it was based on.

Gameplay
In addition to color, the player is given the option to control one of three characters, either Sarah, Mike, and Guy. The differences between the characters determines the speed and health tradeoff for progressing through the maze-like levels.

At the end of the game, the player is presented with a password (pressing 10 times,  10 times followed by ) to play as the final boss, D.D. Fox.