Discounting the other space marines that nobody likes so much, there's basically just Samus, Ridley, Mother Brain and other space pirates, and some more animalistic aliens.
Smash Bros movie plz
Fire Emblem would work better as a TV series. There are so many characters in each game that they'd have to omit or shortchange a lot of fan favorites in a movie.
Wario would be a great movie protagonist. He is funny, adventurous, and a bit rude and selfish but still nice enough to be liked by the audience.
There could be a film about one or more of his games, maybe with some focus on WarioWare too, or a brand new adventure that hasn't been seen in any of the games yet. Even an ¨alternate universe Wario¨ could be possible.
I also wanna see a move based on Luigi's Mansion, in the form of a parody on the ¨haunted house¨ horror movie subgenre, much like how the game itself is essentially a stealth parody of the Survival Horror video game genre.