Why Sm4sh characters joined the game, based on their trailers

Villager: Received an invitation
Mega Man: To fuck Nintendo characters up
Wii Fit Trainer: Sick of the other characters not being fit
Rosalina: To crash the party
Little Mac: Doc Louis told him to
Greninja: To break up a fight by beating the shit out of everyone himself
Miis: Nintendo executive rivalry
Palutena: Because she wanted to
Dark Pit: To ruin Palutena’s fun
Pac-Man: Sick of there being no yellow characters confirmed yet
Lucina: Because her father was acting like a little bitch
Robin: Because Lucina couldn’t handle herself
Shulk: He attacked Bowser for no reason and the other characters started attacking him
Bowser Jr.: To beat the shit out of Mario
Duck Hunt: Mario invited him
Mewtwo: Wasn’t invited twice in a row, came anyway
Lucas: Because Ness couldn’t protect himself
Roy: Everyone forgot about him
Ryu: The fighters from his game were too easy
Cloud: Because he could
Corrin: Decided “fuck this shit, I’m out” and abandoned both his families
Bayonetta: To further her angel genocide