Golurk. It was the "odd" pokemon in my team from the minute I caught it. It helped a lot but I was expecting a bit better from it. I still like it and use it on my team. And I'm also dissappointed in Zebstrika. It was always the weak one on my team. The only thing it has is speed.
Zebrastrike is a bit disappointing but Garvantula isn't exactly all that better. Can't say the electric types are getting good stuff here