Stored Power Sweeper:
Toxtricity (Amped Form) @ Throat Spray
Ability: Punk Rock
Nature: Timid (+Spe, -Att)
EVs: 252 SpA / 128 HP / 128 Spe
- Shift Gear
- Stored Power
- Boomburst / Sludge Wave / Sludge Bomb / Acid Spray
Using a combination of the Throat Spray item and Shift Gear, it is possible to get Stored Power to deal quite a lot of damage. Firstly, Overdrive is a solid sound move, that deals STAB damage and activates its Throat Spray. Going to the bottom, Boomburst fills a similar role, while the latter three options are used to deal STAB damage, and to have a good option against Soundproof. Shift Gear can be used to set up, and boost the power of stored power. Unfortunately, it increases Attack instead of Special Attack, but it still is helpful for the boost. If Shift Gear is used, the power of Stored Power increases to 80 automatically. If you use two Shift Gears and attack with a sound move once, the power is boosted up to 160! However, Toxtricity needs to be survive to pull this off, so I gave him 128 EVs in HP to help it.
Overall, this set can be used against a wide variety of Pokémon, but may struggle against ground types and Ferrothorn.