Tate and Liza/Manga/History

Tate and Liza are the guardians of Mt. Pyre, having taken over the position from their grandparents. When Flannery calls the Gym Leaders together for a meeting about Team Magma and Team Aqua, Tate and Liza are forced to ignore the call so that they can head over to Mt. Pyre. There, they encounter Team Magma, who aim to steal the Red and Blue Orbs so that they can be used to control and. The attackers turn out to be illusions created by Blaise. By distracting Tate and Liza with his illusions, Blaise is able to easily sneak into the chamber holding the orbs and steal them.

Tate and Liza later appear on with Juan, who is revealed to have rescued them. They are tasked with training and  so that they would be ready to face Groudon and Kyogre. They train Ruby and Sapphire in various forms of Double Battle styles so that they may work together and defeat their opponents. Once the time has come for Ruby and Sapphire to head off, Tate and Liza award Sapphire the Mind Badge.

After both Team Magma and Team Aqua are defeated and Groudon and Kyogre have returned to their deep slumber, Tate and Liza celebrate the victory with their allies and thank Sapphire and Ruby for their assistance in the battle.

Tate and Liza travel by means of Wallace's aircar to Sootopolis City, along with Juan and Lisia. They and several others are called to the city to assist in stopping Grand Meteor Delta, a giant meteoroid threatening to destroy the planet. When the plan to attack Grand Meteor Delta starts, Tate, Liza, and the others have their Pokémon attack the meteoroid at the same time. This, combined with the might of Mega, successfully shatters Grand Meteor Delta into pieces.