I have made the BEST strategy you'll ever find!

(Didn't know what category I should put this in, sorry)

There a couple and they all revolve around Gardevoir and Infernape

They are both double battle strategies

First, start with Mega Lopunny and Gardevoir (yes, Mega right off the bat). Use Skill Swap with Gardevoir on Mega Lopunny. Gardevoir should have Trace, so it gives Lopunny one of the opponent's abilities and Gardevoir has Scrappy. Switch Mega Lopunny with Infernape. Use Skill Swap on Infernape. Infernape now has Scrappy and, for this one, Gardevoir has Blaze. Now, Infernape can hit Ghost types. Here's what makes this fun, though. Teach Gardevoir Mystical Fire and return Infernape and send out either Koraidon or a Pokémon that has Drought ability. Gardevoir reaches low health and Mystical Fire is now a beast to deal with. To make it more fun, give it Charcoal. You have a Fire-Power Gardevoir, Infernape that scares Ghosts, and a wild card Mega Lopunny (since the ability recieved in the beginning is random). For this strategy, max out both of Gardevoir's Defenses. You want it to survive enough to do all this. This strategy is literally just for fun.

The next one is still fun but actually dangerous. Max out Gardevoir's Attack and spread the rest of the Base Stats between the Defenses. For your first Pokémon, it's still Gardevoir with Trace, but either Serperior or Malamar with Controversy get sent out. Skill Swap, switch out for Infernape (now with Iron Fist), Skill Swap. Infernape has Controversy and Gardevoir has Iron Fist. Gardevoir's move set will be Skill Swap, Fire Punch, Thunder Punch, and Ice Punch. Infernape will know Close Combat and Superpower. With max Attack base stats and Iron Fist, Gardevoir's punches are doing so much damage. You can even give it Boxing Glove, which increases the punching attacks damage, and you have maxed damage. Let's make this better. Gardevoir is Stellar Type. Even though it only works once, it increases the damage. Plus, you don't have to use your gimmick at the start of this battle, meaning you'll get to use it. And Infernape loses the disadvantage of one of its best attacks, Close Combat, and becomes a tank. Use Superpower for even more damage and take less damage. I don't see a need to talk about the last Pokémon. Those three end everything.

You could do the Iron Fist with the Scrappy. You don't have to use Mega Lopunny. Those are just how I came up with the strategies. Also, Infernape should have a Muscle Band. Game over.

Maybe the Blaze startegy but use an ordinary Pokémon instead of Mega, give Gardevoir a Fire Terra, and use Koraidon (or a Drought Pokémon) with Heat Rock. The ultimate Fire type.

These are the perfect strategies!