Mario is also still putting out 2D entries on the regular, which could make combining styles all the more interesting if done right. Sonic X Shadow Generations shines brightest with its Shadow ...

While KH Studio’s Mario vs. Sonic trailer is a certified fan-made video, a movie featuring the two heavyweight characters of the gaming industry could certainly happen one day.

Co-op has been a staple feature of many Sonic games for decades now. These examples are the best of the bunch.