 The game was initially developed as a three button-based fighter, allowing to remain simple to be picked up by players but still offering a variety of combinations of moves, while limiting the amount of animations for the various moves for all characters.The three buttons were designed to mimic the light, medium, and heavy attacks of the "Marvel vs. Capcom" series.However, the development team also wanted to include an EX system like the one in "Street Fighter IV" where pressing two attack buttons at the same time executes a special move.