I thought it was that + you needed all of them to take 25% chip from rocks, but I think you can achieve this challenge w/o needing to use mons that's weak to 25%. It just requires me to just go through the replay and count it out the percentage all together.Does that mean that we can use a team without any rock weaknesses and get the achievement if every pokemon takes 25% from rocks during the course of the game? I was also under the impression that the requirement was to use 6 pokemon weak to rocks.