When Clemont was abducted by Team Flare, he tried to sent Heliolisk for battle. However, Heliolisk's Poké Ball was being taken by Xerosic, who showed it on a monitor and promised to hurt it if Clemont did not follow his orders.
Heliolisk was with Clemont, who went with the group to stop Team Flare at the Mehir Trail. As Delphox's Mystical Fire attack was launched, Heliolisk dodged it. Clemont recalled how the Pokémon surrounded Delphox, but Shauna's Tri-P would't leave it alone.