enchi's a nerd :^)

SATAN (Riolu) (M) @ Focus Sash
Ability: Prankster
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Drain Punch
- Roar
- Copycat
- Substitute
Focus Sash is to ensure I survive a hit. Smeargle already has Rapid Spin to deal with entry hazards. Roar, and then Copycat +1 priority Roar. Stealth Rock, Spikes, and Toxic Spikes were already setup. If a Pokemon survives the hazards, Drain Punch, along with 252 speed EVs with a Jolly Nature along with 252 attack EVs, I can OHKO the Hydreigon. This is team support to the max.
NOTE: THIS ONLY WORKS IN GENERATION FIVE. Generation Four, Riolu does not get Prankster, and in Generation Six, Copycat was nerfed to avoid this happening.