Every arena
At the title screen press Triangle, Circle, Triangle(2x's), X, Square, Circle, Square.

Every costume
At the title screen press Circle(2x's), X, Square, Circle, Triangle, X, Circle.

Unlimited health
At the title screen press X, Circle, X, Triangle(2x's), Square, Circle, Triangle. When you or a CPU dies, your/their health bar replenishes to the maximum.

Unlimited ammunition
At the title screen press Circle, Square, Circle, Triangle, X, Square, X(2x's).

Play as Butch
Finish challenge mode as Tyke.

Play as Nibbles
Finish challenge mode as Spike.

Play as Spike
Finish challenge mode as Tom.

Play as Tyke
Finish challenge mode as Jerry.

Play as Monster Jerry in multi-player mode
Finish challenge mode as Lion.

Play as Robot Cat in multi-player mode
Finish challenge mode as Eagle.

Play as Ducking
Finish challenge mode as Nibbles.

Play as Eagle
Finish challenge mode as Duckling.

Play as Lion
Finish challenge mode as Butch.

Hints & Tips

Secret courses
When your on tournament or quick game modes, go to team battle and place players one, two, and three on team "A" and player four on team "B". Now choose these players. First Spike, then Tom, then two Jerrys. You will now have Some Like it Hotter and Raging Mouse courses available. If you want to play these again, redo these steps. Note: Every player have to be human.

Note: This need's two controllers. For the secret levels you have to choose Tom for player one and Tom for player two. Turn off the other players. Note: Both players will have to be human. To have the levels again, redo this.

Secret weapons
Here is a list of every secret weapon and their effects. The weapons listed can only be located by destroying the playing field. The message "Map Destroyed" will now appear when you have destroyed everything that can be broken. Note: In the two secret stages, "Some Like It Hotter" and "The Raging Mouse", fields can not be broken, there are no secret weapons for them.

That Sinking Feeling: Octopus (if thrown hard, causes other player to petrify).
A Fridge Too Far: Rotten Eggs (poisons player when thrown)
Haunted Mouse: Pirate Sword (stabs player).
Liao Meow: Bee's Nest (stuns player when thrown).
Franken Mouse: Electric Bomb (shocks player when thrown).
Towering Inferno: Time Bomb (10 seconds to throw at other player; explodes on impact).
Paws: Electric Eel (shocks player when stabbed).
Luncheons And Dragons: Excalibur Sword (knocks player unconsousn when stabbed).
Snow Fight: Ice Barrel (freezes player when thrown)
Scrap Yard Scrap Up: Hammer (knock player unconscious in one hit).
Unfurgiven: Branding Star (Burns player to a crisp when stabbed).

When your on Luncheons And Dragons, hit anything that can be broken. When it says "Map destroyed", look for the sword in the rock to locate the secret weapon. The same can be done on every level for different weapons. Note: If you use Jerry, Nibbles. or Tom, you may receive a costume on Lungens And Dragons. On the western level, you can access a costume with Tom, Nibbles, and Spike.