Professor Sycamore sent three starter Pokémon, including Fennekin, to Trevor and to give it to his friends. Just then, Xerneas and Yveltal appeared and started attacking. Their collision made a blast, causing Trevor to drop Fennekin's Poké Ball and the third Pokédex. Trevor was worried about Fennekin, after he and his friends went to Aquacorde Town.
As the others had interrogated the grunt, who was supposed to steal one of the Mega Stones, Malva decided to act personally in this situation. She noticed Fennekin and took it, then crushed the Pokédex with her heel.
Malva admitted she wanted to burn Gurkinn, Diantha and Korrina with her Braixen, just when they would walk into their trap. After the group started battling, including Diantha and Korrina, Malva and Braixen observed the situation, with Malva claiming "all the key players have arrived". Malva soon faced Diantha and had Braixen use Magic Room to trap Diantha in. Malva admitted she had Braixen use Magic Room to check if it could negate effects of Mega Stones and saw it did not. Nevertheless, she had Braixen use Flame Charge to attack Diantha's Mega Gardevoir, who dodged the attack. Braixen used Fire Spin to trap Diantha and Mega Gardevoir, just as Malva intended to trap them.
Braixen stood by Malva, who spoke to Lysandre and Xerosic at the Pokémon Village.
Delphox passed by the Pokémon that were to be used for the Ultimate Weapon. Furfrou, who originally belonged to Shauna, realized that Delphox was the Fennekin that was blown away in the attack on Vaniville Town. Furfrou started barking, but Delphox ignored it. Delphox was placed as the guard, to prevent any intruders from spoiling Team Flare's plans. It soon sensed enemies approaching, who blew away Team Flare's protections. Delphox threw its twig to use Fire Spin and breathed out Mystical Fire, but missed. Clemont, who had saved Bonnie from Delphox's attack, noted how even without its trainer, Delphox was still a threat to them. The Vivillionists and Viola distracted Delphox, letting Bonnie pass by it and destroy the stones, thus disabling the Ultimate Weapon. Delphox was soon defeated. Just as everyone was to let Delphox lie unconscious, the Fufrou stood in place, since it didn't want Delphox to be abandoned.
As the Gym Leaders reunited with the group of Vaniville Town, Clemont passed Delphox to Trevor. Trevor thanked Clemont, promising from then on, he would take care of it.
|Magic Room||Changing Gengar|
|Flame Charge||Surrounding Braixen|
|Fire Spin||Surrounding Braixen|
|+ indicates this Pokémon used this move recently.*|
- indicates this Pokémon normally can't use this move.
- ^ X&Y001: An X-cuse to Come Out and Play
- ^ X&Y002: X-actly What They Wanted
- ^ X&Y003: Inn-teresting Developments
- ^ X&Y021: Dancing Vivillon
- ^ X&Y025: Gathering Klefki
- ^ X&Y026: Tying Trevenant
- ^ X&Y027: Changing Gengar
- ^ X&Y028: Surrounding Braixen
- ^ X&Y035: Scizor Defends
- ^ X&Y041: Charizard Transforms
- ^ X&Y044
- ^ X&Y045
- ^ a b X&Y046