OK, this is pretty ballsy, but i think it could be fun.
This is a Double Battle Strategy!!
First, you get Exeggutor with Harvest & then your choice of Groudon or Ninetales(Drought).
Exeggutor (M) @ Focus Sash
Trait: Harvest
EVs: 4 HP / 252 Def / 252 SDef
Calm Nature (+SDef, -Atk)
- Skill Swap
- SolarBeam
- Stun Spore
- Psychic
Ninetales (M) @ Custap Berry
Trait: Drought
EVs: 252 SAtk / 252 Spd
IVs: 0 HP 0 Def 0 SpDef
Modest Nature (+SAtk, -Atk)
- Endure
- Dark Pulse
- Flamethrower
- SolarBeam
Groudon @ Custap Berry
Trait: Drought
EVs: 252 Atk / 252 Spd
IVs: 0 HP 0 Def 0 SpDef
Adamant Nature (+Atk, -SAtk)
- Endure
- Hammer Arm
- Stone Edge
- Earthquake
So here is what you do:
You send out Exeggutor and, for now, Ninetales. Ninetales uses Endure while Exeggutor uses Skill Swap on Ninetales(weather is already set up, so it won't matter.) Now, Ninetales has Harvest. Most likely, people want to take out weather leads, so it is knocked down to 1 HP or whatever as long as it is below 25%. Exeggutor is done. Now, next turn, Ninetales' Custap Berry will activate allowing it to go first. With Harvest, it will get the berry back every turn(as long as it is Sunny). Give it any attacks you think are good.
BEWARE OF PRIORITY!!
This can work on any Pokemon that can learn Endure. I just chose Ninetales & Groudon because of the instant sun. So if you choose a non-Drought Pokemon, setup sun beforehand.
Try using a Pokemon with low overall bulk. Groudon might not work too well because of his natural bulk, but hey.