Destroy All Humans! Big Willy Unleashed Cheats

Cheat Codes
On the unlockables menu, hold the nunchuck analog stick up for a fiew seconds and an enter cheat window should appear. Enter directional commands on the Wiimote D-pad.

[Up], [Right], [Down], [Right], [Up]: Unlock all game worlds
[Right], [Left], [Down], [Left], [Up]: "Lots Of Guns"
[L], [D], [U], [R], [U]: Can't Be Killed
[Right], [Left], [Right], [Left], [Up]: Crypto Dance Fever Skin
[Right], [Up], [Up], [Left], [Right]: Infinite Ammo
[Right], [Right], [Up], [Left], [Left]: Infinite Jetpack
[L], [U], [D], [U], [D]: Kluckin's Chicken Blimp Skin
[Up], [Right], [Down], [Down], [Left]: Stealth Space Ninja
[Left], [Left], [Up], [Right], [Down]: Unlimited Big Willy Battery

Skins and Modes
All Chicks Mode: Complete the "Taking Flak" mission.
All Willy Worker Mode: Complete the "Welcome to Fantasy Atoll" mission.
Body Snatch Animals Mode: Complete the "Jiggling Bombs" mission.
Grays in Black Skin: Complete the "Requiem for a Ratpoo" mission.
Locomotive Blimp Skin: Complete the "Country Roads, Take Me Home" mission.
Radioactive Zombie Mode: Complete the "Dinky and the Brain" mission.
THQ Blimp Skin: Complete the "Burn, Baby, Burn!" mission.
Working the Counter Skin: Complete the "Willy Unleashed" mission.
Zombie Jamboree Mode: Complete the "Shields Down" mission.

Unlockable Shrink Ray
Complete all the main missions.