Batman Forever is an action game based on the movie of the same name, released for the Sega Game Gear in the USA and Europe. It's likely a side-scrolling beat 'em up with Batman fighting various villains from the film. The gameplay probably involves combat and navigating levels. Sega is the likely publisher, though further specifics on licensing and development are needed.

Batman Forever (USA, Europe)

Baku Baku Animal (USA)