Stopping the Rage of Legends! (Part 1)

When arriving at Driftveil Gym, Ash & Co. are soon sent to Milos Island by Clay in order to look for some Revival Herbs. However, when they arrive on the island, they learn that the plant isn't growing because someone has disturbed the shrines of the Pokémon that live on the island. Things get even more iffy when the legendary Pokémon: Tornadus and Thundurus appear and start attacking...