Who, What, When, Where, Wynaut? - S8.E21

On the way to Pacifidlog Town, Ash and his friends run into Drew. May challenges him to a practice battle, but they get interrupted by Team Rocket. However, Team Rocket's sub gets sucked into a whirlpool and everybody winds up getting separated on the mysterious Mirage Island. Now, Ash, Max, and Brock must find Drew and May.