Gardevoir,Vespiquen, or Weavile. This is what I had hopes for them if they could be playable characters:
Gardevoir: Up Special- Teleport (a bit like Zelda's), Down Special- Imprison (stops the foe in it's tracks for a little bit of time and reflects projectiles), Side Special- Shadow Ball (like Mewtwo's), Normal Special- Confusion (like Lucas' PK Thunder). Final Smash- Psychic (any opponent that touches Gardevoir is sent flying. If they damage Gardevoir, they recieve a little bit of the damage.)
Vespiquen: Up Special- Silver Wind (uses Silver Wind to send foes up into the air and slow their movements), Down Special- Toxic (poison flows from the ground and pools where Vespiquen had just used it.. Anyone who touches it receives damage; like Olimar's white Pikmin), Side Special- Power Gem (fires a few rays that have a relatively good range), Normal Special- Poison Sting (shoots Poison Sting in a straight line. Has a poor attack range). Final Smash- Attack Order ( a massive swarm of Combee attack everyone on the field. A bit like King Dedede's Final Smash, but far more dangerous to foes).
Weavile: Up Special- Ice Punch (performs an uppercut that might freeze foes), Down Special- Quick Attack (crouches, then sprints forward and strikes), Side Special- Ice Shard (fires a barage of ice shards; has very good range), Normal Special- Brick Break (deals a heavy blow that cracks through people's Shields). Final Smash- Night Slash (Weavile glows with a dark aura, then sslashes any and all enemies in its path; can be compared to Pikachu's Volt Tackle, but a little easier to control).
I had a lot of time on my hands when I thought this up. I thought it was cool.