Annoying Manectric -- To annoy opponent to extreme level!
Ev Spread: 252 spd, 252 sp. atk, 4 Hp Item: Focus Sash
How to make use of this strategy:
1st Thunder Wave opponent's Pokemon, and force it to switch out using Roar, and repeats the Wave-Roar combo. By doing this, you will able to cripple almost every Pokemon of ur opponent, and messing up their plan by force switching. After you are done with Thunder Wave, then you can start to spam Electro Ball. This will Deal Serious Damage to opponent's Pokemon after having them paralyzed, and probably will OHKO. Volt Switch is for some really unfavorable situation, like the opponent have Pokemon with Magic Guard or Thunder Rod etc.
However to use this strategy, you have to ensure Manectric is faster than any of ur opponent's Pokemon. If not you are not fast enough to cripples them before they hit you and you might end up fainting. Better strategy is baton passing Agility to Manetric, with evs and baton pass, I'm sure that Manetric will be faster than most of the Pokemon.