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.