Credit Cheat:
Go to Option mode and highlight credit, then press: Left, Right, R1, R2, L2, L1,
Up, Down then keep pressing the Circle to increase credits.

Bonus World:
Enter the following Cheat on the Title Screen and you'll get another World with
slightly different Puzzles and a faster Pointer !
R1 UP L2 DOWN

To play as Columbo (Shorty's pet mouse) :
Finish the game at the normal difficulty level using Shorty AFTER winning
Robo-Z. I have done this already.

Another Character:
finish the game at the normal difficulty level using Hamm AFTER winning Robo-Z.
I have done this as well.

Submission:
amvxal@hotmail.com