Tails in Super Mario Bros. is a ROM hack, not an officially released game. As a ROM hack, it involves modifying the original Super Mario Bros. game, which was originally produced by Nintendo. The modification likely centers around adding the character Tails from the Sonic the Hedgehog franchise into the Super Mario Bros. environment. The gameplay would retain the core mechanics of Super Mario Bros. but would add Tails' characteristics and abilities.   Being a fan-made ROM hack, there's no single developer or publisher.

Tails in Super Mario Bros.

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