As Alexa was finishing her article on Vaniville Town, she noticed Heli was charging itself with solar energy. Knowing she hasn't taken Heli out for a walk for some time, Alexa decided to do so, as they both walked to the Prism Tower. Just as Alexa was arguing with the editor-in-chief, he took her Heli as hostage. Even after X defeated the editor-in-chief's Pokémon, the editor still showed that he had Heli as hostage. X, left, however, as Heli started charging, with the sun shining on its skin. A moment after, the editor was electrocuted by Heli.
The group remembered Alexa and her Helioptile, as Alexa was the one that gave them the article about Xerneas and Yveltal. The article was read by Y, who managed to memorize it.
None of Helioptile's moves are known.