Pokemon Platinum Crasher Wake?

The game doesn't release too much electric pokemon available for you while you're going through the main story plot. Roselia,the evolved form of Budew,could take out Quagsire. You really should have trained Shinx and evolved it into Luxio, or Luxray if you possibly can. Basically, Roselia and Muxio are the pokemon commonly used to overcome this Gym Leader.