Ampharos @ Ampharosite
Ability: Static
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
- Thunderbolt
- Cotton Guard / Dragon Pulse / Power Gem
- Hidden Power [Ice]
- Dragon Pulse / Power Gem
So this Ampharos would be OP if it were in Trick Room (TR) or Electric Terrain (ET), because ET would mean guaranteed OHKOs, and TR means actual sweeping. Apparently Mega Evolution helps it SpA more than Wise Glasses.
The move Thunderbolt is for STAB and works well against many opponents.
Cotton Guard is to raise it's bad Def, as SpD was already increased by EVs.
HP Ice is for coverage against resistances and weaknesses, as it's super effective against Ground, Grass, Dragon, which is most of all our problems.
Dragon Pulse would mean extra STAB from Mega Evolution, and kills any more dragons that need slaying.
Alternatives: Power Gem would mean super effectiveness against 4 types, including Ice (one of our weaknesses), and works better than Signal Beam.
Signal Beam isn't the best choice, but it does work decently as coverage against unprepared types like Grass and Dark. Watch out, Zarude!
Agility could work as your speed boost instead of Trick Room, as long as you're prepared.
Reflect / Light Screen would work to your advantage against most sweepers, but Brick Breakers would immediately smash your barrier. Be careful!
Counter could work, as to taking advantage of low Spe and Cotton Guard.
Iron Tail has decent coverage, high power but low accuracy. If you have trouble with accuracy for Iron Tail, choose another move.
Toxic would help deal more damage, but watch out for Steel or Poison types. It doesn't work against Immunity, either.
Heal Bell is a good support healing move to the rest of your party.
Outrage is a bit risky but powerhouse move if used correctly.
Focus Blast is a high damage-dealing move, but risky with the accuracy. However, it can get you out of plenty of bad scrapes.
Focus Punch is a powerhouse, but you need to predict your opponent. It is risky, however if used right, it's worth it, as it can easily wipe out the target, who's in for some trouble.
Electric Terrain if you don't have another Pokemon that can use ET, although it's recommended that you use TR and ET and then U-turn/Volt Switch/ just switch to Ampharos.
Facade against players who like to burn, paralyze or poison the opponent, dealing a double 140 damage if this does happen. Thould could easily wipe out nearly all of Toxic users and such.
Magnet Rise is good for annoying Ground-types for a while, so use that 5 turns to set up with the moveset you've chosen.
Fire Punch goes up for decent coverage against certain types such as Grass and Bug. Also helps against Ice.
That's it. If you have questions or suggestions, feel free to comment!