Magneton @ Zap Plate 
Ability: Analytic 
EVs: 252 SpA / 4 SpD / 252 Spe 
Modest Nature 
IVs: 0 Atk 
- Lock-On 
- Zap Cannon 
- Flash Cannon 
- Volt Switch
Bluff Choice Specs with Zap Plate, then when they least expect it, Lock-On and hit them with a powerful, paralysis-inducing Zap Cannon. You might want to run a Dugtrio and a lure for stuff like Flygon and Seismitoad since this set isn't running a Hidden Power. You could probably run a Hidden Power like Water over Flash Cannon.