Burning Fletchinder (Japanese: ヒノヤコマ、燃えるHinoyakoma, Burn) is the 571st chapter of the Pokémon Adventures manga, and the 23rd chapter of the X & Y arc.
Plot
Spoiler warning: this article may contain major plot or ending details.
A bunch of Sky Trainers and their Vivillon are surrounding a helicopter with X, Y, Trevor, Shauna, Tierno and Cassius inside. They believe that the Sky Trainers were sent to attack them by Team Flare, just as their Vivillon attack the helicopter with Hurricane, but they don't crash just as one of the Sky Trainers lands on the front window and starts knocking on it. Y imminently recognizes the Trainer as Yvette, puts on her sky suit and exits the helicopter to battle her. Cassius says that the Sky Trainer school in Vaniville Town was blown off the map and many students are still missing, just as Y encounters Yvette.
A flashback at the sky trainer school is shown where there are multiple scenes of Yvette bullying Y because since she is the daughter of a celebrity and all the teachers are giving her attention. Y and Fletchy fly away from the helicopter so Yvette's group can't attack the others, while X decides to look for the eye. Yvette catches up to Y and starts to bully her again, while her Vivillon battles Fletchy. Y finally fights back as Fletchy evolves into Fletchinder, Y is able to get over her depression from her mother and thanks Yvette. By then, X and the others locate Aegislash, and Élec defeats it with Discharge, revealing that Yvette and the Sky Trainer's were under Team Flare's control.