ok, i know i havent done that but the league didnt have a rule for that, if you want the victory is all yours. But let me get straight, in big tournaments people are allowed to change pokemon once, MAX twice every battle. I know the league doesnt say it and also the wonder launcher thing. Not for being rude is just some advice. You train your pokemon so it can go through any disadvantage it have in front of it, thats why you raise them and also you teach them moves that are powerfull against their disadvantages. You change pokemon since we start the match, and i didnt do it not even once. Changing pokemon does not mean strategy, it means that you dont trust them enough, that you dont trust their speed to move first, or the attack to defeat anything that comes out of the pokeball. I know i use wonder launcher to have an opportunity and that is totally my fault. The victory is yours