Pokémon the Series: XY / XYZ · XY arc
XY042 · Origins of Mega Evolution!
マスタータワー！メガシンカの歴史！！
Synopsis
What happens.
On day six of the Pokémon Summer Camp, the final event, the Team Battle competition, has started.
Synopsis adapted from Bulbapedia's XY042 entry, used under CC-BY-NC-SA 2.5.
Story arc · XY001-XY049
XY.
Ash arrives in Kalos with Pikachu; meets Serena, Clemont, and Bonnie. Picks up Froakie. Lumiose Gym puzzle introduces Clemont. Sycamore's lab introduces Mega Evolution.
Read the full XY guidePokémon featured · 20
Who appears.
Linked entries open the species page on the Pokédex. Items without a sprite (alternate forms, regional variants, generic group references) fall back to a name pill.
More from this arc
Other episodes in XY.
Episode synopsis from Bulbapedia, CC-BY-NC-SA 2.5. Editorial context (arc affiliation, cultural moments, character signatures) hand-verified May 2026. Pokémon, character names, and series titles © Nintendo, Game Freak, Creatures Inc., The Pokémon Company, OLM Inc. This is an unofficial fan reference.