Master Hand

Master Hand is the creator of the Super Smash Bros. Universe. Despite always being the final boss, he isn't much of a bad guy, this is a bit easier to see in The Subspace Emissary, also by the aforementioned fact that he created the SSB Universe, but has never destroyed it. He is respected by most of the characters, but there are a few exceptions (such as Ganondorf). Master Hand likes to create, whereas a similar character likes to destroy, although still never destroyed the SSB Universe; however this might be because they are friends, and Master Hand doesn't want Crazy Hand to destroy his creation, but this hasn't been confirmed, nor has any explanation.

Master Hand's Brawl Trophy implies that he doesn't use his full power on the characters, and just toys with the characters that have many victories for fun; some people think that his full power might be Master Core, but the true relation between the two is unknown.