I'd like to see Clefairy (Metronome could be a nice twist), Deoxys (who can change Formes like Samus and Zelda can), Ditto (so it can Transform into ANY character in the game playable or not at random), and Medicham (who could for a Final Smash use a Calm Mind/Rest/Psychic combo where it creates a force field around itself which in turn tosses anyone who gets close to it to be thrown away and it boosts Medicham's attack power for a bit and regain a bit of health.)