The Grim Adventures of Billy & Mandy

Codes

At the main menu, Hold Circle and press the following

Code	Effect
Up, Up, Down, Down, Left, Right, Left, Right, then release Circle	View Concept Art Sketch

Contributed By: GameMasterZer0.

The first 4 unlockable characters can already be played in "VS. Mode". But you have to unlock them in "Story Mode".

Unlockable	How to Unlock
Boogey	Complete Mission 9 in Tier 4 in Mission mode
Chicken	Complete Story mode with all characters and accumulate 10 hours of game play time
Clown	Beat Story Mode once with every character and fight a total of 100 Vs. Mode matches
Dracula	Complete Mission 5 in Tier 3 in Mission mode
Eris	Beat "Story Mode" once with either Billy, Mandy, Grim, Or Irwin.
Fred Fredburger	Beat "Story Mode" once with either Billy, Mandy, Grim, Or Irwin.
General Skarr	Beat Mission 6 of Tier 4 in Mission Mode
Hoss Delgado	Beat Mission 9 in Tier 1 in "Mission Mode".
jack	Beat Mission 9 of Tier 2 in Mission Mode
Lord Pain	Beat Misson 9 Tier 5
Mogar	Beat "Story Mode" once with either Billy, Mandy, Grim, Or Irwin.
Nergal	Beat "Story Mode" once with either Billy, Mandy, Grim, Or Irwin.
nergal jr	Beat Mission 9 of Tier 3 in Mission Mode
Nergling	Beat Story Mode with all characters
Pumpkin	Beat Story Mode once with every character and accumulate a total of 100,000 damage in Vs. Mode
Viking	Beat Story Mode With all characters and destroy every letter in the credits sequence

Contributed By: Jelly Soup, sephirosuy, irwin85, Trexmaster576, and 911gamehelp911.