Hypothetical situation: A Swift Swim Ludicolo is on the field, in rain. After Ludicolo KOes a pokemon, an Altaria with the ability Cloud Nine switches in. The next turn, Altaria mega evolves. Which pokemon would move first? (for the purposes of the example, both mons are max speed w/ boosting nature, and neither use a priority move) I'm guessing that Altaria goes first because turn order is determined at the beginning of the turn, but I just wanted to make sure.