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.

Password:                     Effect:
Up, right, down, right, up.   Unlock all game worlds
LUDUD                         Kluckin's Chicken Blimp Skin
LDURU                         Can't Be Killed
Right Left Down Left Up       "Lots Of Guns"
Left Left Up Right Down       Unlimited Big Willy Battery
Up Right Down Down Left       Stealth Space Ninja
Right Left Right Left Up      Crypto Dance Fever Skin
Right Up Up Left              Right  Infinite Ammo
Right Right Up Left Left      Infinite Jetpack