All characters had universal launchers and throw commands, as well as super attacks which could be performed by filling up super bar. The magic button would allow for performing specials attacks, helping to extend combos. The game was built using the Fighter Maker 2D engine, and would feature a four-button fighting system: light, medium, heavy, and magic.
It's not known which other 11 characters would make it into the original game. The final goal would be 17 in the long run. The initial game release was planned to have 6 base characters in the roster - Applejack, Rarity, Twilight Sparkle, Pinkie Pie, Fluttershy and Rainbow Dash.