Meta-Kraid
Smash Journeyman
Kraid is one of the most iconic Metroid characters. With Ridley as a stage boss (unfortunately) and Mother Brain and Dark Samus as Assist Trophies, he's the most logical character to add. He has extreme popularity for the few games he's appeared in, but unfortunately he hasn't had a recent appearance. He was cut from the Prime games and went I included in Other M; however, he was traded to make an appearance as Meta-Kraid in a future game, whether or not this is still true is unknown.