Forretress @ Leftovers
Trait: Sturdy
EVs: 252 HP / 252 Def / 4 SDef
Impish Nature (+Def, -SAtk)
- Volt Switch
- Stealth Rock
- Spikes
- Toxic Spikes
This is a basic set. Set up and Volt Switch. Use Rocks first.
Volcarona @ Life Orb
Trait: Flame Body
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Fiery Dance
- Quiver Dance
- Bug Buzz
- Whirlwind
Set up Volcarona, then use Whirlwind. Switch!
Riolu (M) @ Focus Sash
Trait: Prankster
EVs: 252 HP / 4 Def / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Roar
- Copycat
- Substitute
- Protect
The trick here is to Roar / abuse Whirlwind. Because Riolu has Prankster, Copycat will basically always go first.
This video helps. Skip to about 1:15.