Yes, Prizefighters has MFi controller support!
Prizefighters on iOS does support controllers and is compatible with the MFI standard.
Prizefighters is the latest and greatest FREE arcade boxing game to hit the App Store featuring an in-depth career, real-time multiplayer, player progression and customization, and fast action gameplay with intuitive fight controls.
Named as one of TOUCH ARCADE'S BEST GAMES OF 2017 - "Working your way up the ranks and buffing out your custom boxer is incredibly fun and the core mechanics are so good" FEATURES Fight other players in real-time online PVP and climb up the rankings Level up and earn coins to unlock new skills and stat upgrades Customize your appearance, ring, and even opponents Progress through an in-depth Career mode and become the greatest champion Compete for high scores in Arcade and Endless modes Play the way you like with multiple control options including gamepad support Take your fighter on any device with Cloud Saves Share replays of your best fights with the online community Completely free to play!
Prizefighters supports MFi controllers.