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How about something like this purely for maximum coverage...or teh lulz.
Lead?
Castform @ Leftovers
Ability: Forecast
EVs: 4 HP / 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Rain Dance
- Sunny Day
- Weather Ball
- Hail/Thunder
Plan being that you go in and use whichever...
Just in case for some reason you feel like doing a 4th one. lulz. I only need 5 as well.
Hydreigon (M) @ Life Orb "Holy @&!* <3"
Trait: Levitate
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Dragon Pulse
- Fire Blast
- U-turn
- Dark Pulse
Cofagrigus (M) @ Leftovers...