Electric
I guess I'm still glad that he can abord Toxic Spikes, but CAP4 (Fidgit) really should have been Electric. He lost by three votes, and if I could have changed my vote, I would have. Lots of other people would have, too — Aldaron gave a great post explaining why Electric was better. Ever since then, I've always felt like Electric was a bit cheated in the CAP process; I'm so glad to see people bandwagoning for it now! :D
We are so making an Electric/Ground Pokemon! Besides Earthquake and the obvious, I have always dreamed of an Electric Pokemon who was immune to Thunder Wave itself.