Being that I'm an Earthbound fan, and knowing Nintendo hasn't shown us much love, I decided: why not include another character who isn't a main character.
How's about... THE STARMAN?!
Look at him, so proud and prideful despite his obscureness as a Nintendo character.
What an *******.
I've got some ideas about his specials, too.
Up-special: PK teleport
Specifically the spinning one. He'll spin around abit, goes up a portal, giving good verticle distance, then coming out of a portal a couple feet near the first one, giving mediocre horizontal distance and he'll come out in an explosion, sorta like sheik's.It goes in a set path.
Neutral special: Laser-beam
The alien/robot enemies you fight in the game usually shot lazers at you, so may as well give him one. It'll be like ROB's, only chargeable and not as strong.
Side special: I dunno
I'm guessing PK thunder, but uncontrollable and shaped like lightning.
Down special: Psychic shield
I'm not sure if anyone in you party could learn this technique, but I remember that some of the alien enemies had a psychic shield already active when you started a battle. Basically, he'll activate a shield that reflects energy attacks with only half the damage given back to the enemy, BUT he can still move,attack,etc, etc. I'm guessing it should only last maybe 10-15 seconds, but that's just me..
Eh, Nintendo can figure out the Final Smash, I can't think of one.
On-screen appearance: A UFO flies over the stage and beams Starman down, materializing like in the game.
Nor can I really think of any taunts... maybe a Borg reference or "DO NOT UNDERESTIMATE US".
Well, that's my crazy fanboy rant. Starman fos SSB4!