I already read bulbapedia and I don't understand it. So can someone explain in a simple way? If this question has already asked this question, just tell me.And I'll hide it.And if this question isn't allowed,I didn't know.(If it is.)
A rotation battle is when you have 3 Poke'mon out at once. To attack, switch the Poke'mon you want to attack with to the front with the arrows at the bottom of the screen.