Flash Fire Gourgeist
It would be interesting to see how her interesting slew of resistances and immunities would play out in the OU metagame.
Now if only her maxed 100 base Attack would be shifted to Special Attack, she will be even better. It's heartbreaking because Gourgeist has a viable special set with moves such as Energy Ball, Fire Blast, Shadow Ball, Focus Blast and Sludge Bomb in her arsenal. But then again, all those precious base points were wasted on Attack. Game Freak still ridin' on that troll train.