I remember in RBY it was Misty that stopped me dead in my tracks multiple times over, what with that darned Bubblebeam and Recover. And then, in FRLG, the irritating Water Pulse and Recover once again made a difficult battle, but hardly as much trouble as RBY did. You've gotta outspeed the things, AND have the elemental advantage, because otherwise her attacks and confusion ram you right through.