Here's the way to do easy battles in your Pokemon game. Make sure you have 2 pokemon diamonds, pokemon pearls, or 1 of each. Get all the Pokemon you want to become stronger, and trade it to your other Pokemon game. Put all the pokemon you trade into your party except make sure the pokemon you used for the Elite 4 are in your Party.Give 1 of the pokemon
the exp. share and battle the elite four train the pokemon till its the level you want it to be and then take the exp. share away and give it to a different pokemon you traded. Then do the same over and over till all the pokemon you traded are the level you want them to be. Trade them back to your other game and then you can battle people and beat them in 1 hit
maybe. Also, the pokemon you traded were your pokemon, so they'll obey you! Hoped that helped!