To use any of the One's impressive aresenal of weapons, enter the password "Maxpower".

To access the Debug Mode, first enter the password HEYBUDDY in at the password screen. A new menu will pop up allowing you to select any stage, any area, turn invincibility on or off, and enable all weapons.

To start on any level, enter the password "Hevyfeet".

Level  Password
2      DIYGIXRA
3      KCSVJTJB
4      RWLKLPBC
5      YQFZMLTC
6      FLZNOHLD

Go to the password screen and type in "thepress". Now, while playing push pause. The "PAUSE" text that usally appears won't be there anymore! It's used for taking screen shots.

Enter "DIEFOOLS" as a password.