Moved to a more appropriate board.
Crusade is done in GameMaker, but I would suggest learning a more flexible language if you want to make games (C++ is a widely used language, for example).
Also, if you don't have experience making games, I wouldn't start with a fighting game. They're very complex and hard to make. Start with a platformer or something simple then work your way up (especially if you want to make something smash-like since it uses platforming mechanics).