The Grim Adventures of Billy and Mandy Hints

Beat story mode 2 times with any character, then a costume should be unlocked.The other costume is in Mission mode.If your having trouble with the fight with the huge alien thing throw a grill or ice cream cart at it.Then hit it with some melee attacks if its frozen.You can use the costumes in battle mode by pressing Y.Hope this helps!

Ok, go to mission mode and beat 5 or all the missions in Tear 1, Then, once you've unlocked Tear 2, beat all the missions, on mission 9, Jack will challenge you, beat him, and he's yours. Aternaltaly beat Story Mode With Hoss,Fred Fredberger,and Grim.

Go to mission mode and beat all the missions in Tear 1. Aternaltaly beat story mode with all top row characters.

To Get General Skarr, keep playing mission mode until you reach a mission to where you have to battle general Skarr by himself and yourself, or you can do a mission to where you are on teams and general Skarr is on the other team. Once you have beaten him, the SUPER SECERET UNLOCKED! will come up(like it always does once you've completed a mission), and the SUPER SECERET will be.........GENERAL SKARR!!!!! one of the most powerful players in the game(Note:To get him in mission mode, you have to battle him, he can't be on your team). Aternetly beat story mode with all the bottom row characters. Except for: Lord Pain, and Boogy. You have to unlock Skarr to unlock thoes characters. to get them both, you have to beat story mode with general skarr.