One of the oddest things Game Freak did with Pokémon X and Y a decade ago was introducing the Mega Evolution mechanic and not giving a beefier form to the game's three starters: Greninja, Chesnaught, and Delphox. Greninja went on to have a special "Ash-Greninja" form based on a transformation shown in the anime, but none of the Kalos starters got to take part in their region's battle gimmick. That's finally changing in Pokémon Legends: Z-A.