Xerosic

Xerosic's Expansion Suit: the post-game Looker missions

After Team Flare falls, Xerosic goes into hiding in a secret floor of Lysandre Labs and builds an Expansion Suit that grants shapeshifting, superhuman reflexes and the power to hijack Poké Balls. He hires the Lumiose Gang as security and a girl named Emma as his test subject, remote-controlling the suit while she sleeps so that a figure called Essentia goes on a crime spree through Lumiose City.

Looker and the player unmask Essentia and find his lab. Moved by Looker's concern for Emma, Xerosic frees her, surrenders for trial and leaves her his Pokémon and the deactivated suit. In the anime he instead oversees Team Flare's Zygarde experiments, is beaten by Clemont at the Lumiose Gym and is later arrested by Officer Jenny.