All Levels Open
Enter the following password: Pinky, Dot, Nurse, Pinky, CEO, Wakko, Ralph, Brain, Nurse, Brain, Brain, Yakko.

Studio & Sci-Fi Password
Enter the following password: Brain, Dot, Brain, Dot, Ralph, Nurse, Wakko, Dot, Yakko, CEO, Pinky, Wakko.

Studio Password
Enter the following password: Ralph, Ralph, Brain, CEO, Wakko, Pinky, Dot, Yakko, Dot, Nurse, Brain, Dot.

Studio, Sci-Fi, & Fantasy Password
Enter the following password: Ralph, Wakko, Pinky, Nurse, Yakko, Pinky, Dot, Wakko, Dot, Nurse, Yakko, Dot.

Studio, Sci-Fi, Fantasy, & Aquatic Password
Enter the following password: Nurse, Nurse, Brain, Ralph, Dot, Brain, Yakko, Dot, Yakko, CEO, CEO, Wakko.

Action Replay codes
0CFCC090 Invincible
82ABB101 Every coin gives you 999 saved slot rotations
82ABFF02 Every second coin gives you 99 continues
82ABFF05 Every slot machine roll gives you 99 continues
839011FF Higher jump.
8390D1FF Press and hold up or down against some walls to "climb" them
8390FEFF Better vertical jump control - can move up and down more than
once in the air.

83901CA9
83901D08
83901E01 Super jump and float