Baby Toy of Death Special Weapon
While in the pause menu, use the d-pad to enter the directions.
Cheat Effect
Left, Left, Right, Right, Z, Nunchuck down, Nunchuck down, Z, Up, Down Unlocks the Baby Toy Weapon
Secret Telephone Sword
After beating the game, you get a code saying to do the following in pause menu!!!

Cheat Effect
Right, Left, Right, Left, Down, Down, Up, Up, Z, Nunchuck Down, Z, Z, Nunchuck Down, Nunchuck Down Recieve Telephone Sword

Unlock the chainsaw
At the pause menu push in up up down down left right left right on the d-pad then press Z swing nunchuk down Z swing nunchuk down
Cheat Effect
up up down down left right left right Z nuchuk down Z nunchuck down Unlock Chainsaw

Unlock Swordfsh
At the pause screen enter: Up Down Up Down Left Right Left Right Z Nunchuk down Z Nunchuck down. and you should unlock the Swordfish as a weapon.
Cheat Effect
Up Down Up Down Left Right Left Right Z Nunchuk down Z Nunchuck down Unlock Swordfish