Super Smash Bros' Ryu
Most of the DLC characters in Super Smash Bros. are great, because the standard of quality is so high for building characters in those games. But Ryu, a guest character from Street Fighter, is really special. Not only is his stage really great, but the central gimmick for his play style is so cool! Essentially, he controls like a typical Super Smash Bros. character, but if you incorporate Street Fighter-accurate inputs for his special moves, their power is pumped up. It is so creative, and so much fun.