Swampert @ Swampertite
Ability: raindance
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Waterfall
- Earthquake
- Ice Punch
- Power-Up Punch / Stone Edge
Mega Swampert can set up its own Rain before the Mega.
Hydreigon @ Razor Claw
Ability: focusenergy
EVs: 4 Atk / 252 SpA / 252 Spe
Mild Nature
- Draco Meteor
- Superpower
- Fire Blast / U-Turn
- Flash Cannon
100% Crit rate, spam Draco Meteor and Superpower without caring about the stat drops.
Hawlucha
Ability: encore
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Acrobatics
- High Jump Kick
- Iron Head
Switch into a Ground move or a boosting move, and boom, you got a free switch in, and a turn to set up.