Home PC Playstation 3 Wii Xbox 360 Top Cheats Latest Cheats Top Categories Forum Search Search Cheats Jebo Network Jebo Avatars Jebo Chat Jebo Chords Cheats Jebo Screenshots Jokes Guitar Lessons Home > Wii > Grim Adventures of Billy and Mandy > Unlock Chicken You have selected the following cheat: Unlock Chicken. Unlock Chicken To unlock chicken you must finish story mode with all characters on any difficulty and have at least 10 hours of gameplay. Other Cheat for This Game Home > Wii > Grim Adventures of Billy and Mandy > Unlock Chicken If you find any problems with the video game cheats on this site please feel free to contact us..