Super Smash Bros is an amazing game. It satisfies our hunger for crossovers by combining our favorite characters into one game and letting them tear each other apart -- or work together.
It also pairs people together that you would never expect to be together until you hear someone say, "Wouldn't they be cute?" and suddenly that couple is all you can think about.
That's gotta be the only explanation for the Wii's Wii Fit Trainer being paired with Animal Crossing's Villager. Their popularity is baffling, but spend enough time looking at the fanart, and you start to see what everyone else is seeing: they are kinda cute together...
Photo credit: RZSTUDIO