Mario in Sonic Battle is a hypothetical crossover fighting game, not an actual released title. It is a fan-made concept combining the popular Mario and Sonic the Hedgehog franchises. Gameplay would likely involve fighting game mechanics similar to titles like Super Smash Bros., featuring character-specific movesets and special attacks.  The concept has fueled fan discussions and potential ROM hacks, but no official release exists. The appeal rests in the novelty of witnessing a clash between Nintendo and Sega's iconic mascots.

Mario in Sonic Battle

March of the Penguins (U)(Sir VG)