Soon after arriving on Milos Island to find the rare medicinal plants known as Revival Herbs for Driftveil Gym Leader Clay, our heroes, along with island resident Lewis, encountered the Legendary Pokémon Tornadus and Thundurus. The barriers erected to keep them away were destroyed by Team Rocket, and the two Pokémon are now battling ferociously, threatening the island’s existence.
With the help of Lewis and his Gothorita, Iris successfully summons the Legendary Pokémon Landorus, the island’s guardian and the only one who can control Tornadus and Thundurus. But after Landorus appears, Team Rocket shows up! It turns out they destroyed the barriers as part of a plot to capture all three of these powerful Legendary Pokémon! Ash, Iris, and Cilan team up to defeat the villainous trio and free the three legends—but when the three-way battle starts up again, it’s clear that Landorus was seriously injured in the rescue attempt, and Tornadus and Thundurus seem to have the upper hand.
Lewis collects the few Revival Herbs he has left and offers them to Landorus, who is immediately revitalized! With its newfound strength, Landorus finally manages to stop the battle between Tornadus and Thundurus and convince them to work together to restore Milos Island to its pristine condition. Now, Revival Herbs grow quickly in enormous quantities—more than enough to satisfy Clay’s request. It looks like Ash is off to his next Gym battle!