>>39544645In BW the new battle formats were supposed to be kinda like "version-exclusives".
Black had only one trainer that did Triple Battles, and half a dozen other trainers that did Rotation Battles.
In White it was the opposite, only one trainer did Rotation Battles, and the others did Triple Battles instead.
BW2 dropped the gimmick and distributed them evenly across both games, plus adding the two battle formats to PWT.