A Historic VictoryG 30

Boot up Killer Instinct Gold. Wait on the main menu until the selection screen goes away and it begins rolling through character bios. Enter this code: Back button, A, Right on the right stick, Back button, A, X. If you did it correctly you'll hear a laugh. Now to go to any mode and select Gargos (he looks like a gargoyle). After a few seconds in game with him the achievement will pop.