>>715177135
X/Y had troubled development, particularly as The Pokémon Company (Game Freak and Creatures Inc primarily) had to shift to 3D. Modelling shitloads of Pokémon in 3D for the first time was a huge logistical challenge alone.

Go look up the Game Freak leak, we found out insane things about Arceus and Regigigas legendary lore, cut-mons like this Kalos flamingo that's waaay better than Paldea's Flamigo, and even concept art for Mega Jynx.