Wallace and Gromit in Project Zoo Gamecube Cheats

All guns
Press Z, A, B, Y, R, X to unlock all guns with unlimited ammunition.

Bonus Level
After you rescue the baby, go to the area where the elephant has knocked down the doors. To the left of the doors leading to the next part of the jungle is a water chute. Jump into that water chute and go into the hole. You will reach a bonus level.

Destroying Enemies
Most enemies can be destroyed with Gromit’s hand to hand combat moves. Use them instead of your weapons. You might need to stockpile ammunition for other tasks.