Usually, with each generation, the Pokémon Company releases three games, with the third game improving and adding new features to the previous two games. For example, Platinum was released in 2008 after the release of Diamond and Pearl, and Pokémon Crystal followed Gold and Silver.
However, X and Y never got the third game. The supposed Pokémon Z never got released. Instead, the franchise skipped the third installment to start developing Sun and Moon (Generation 7).
What is Pokémon Z?
Z would have been the third installment in generation 6 of the main series of games.
The game would have vastly improved on X and Y, which successfully transitioned the franchise into 3D on the Nintendo 3DS.
It is likely that with Pokémon Z, the game would have integrated the franchise further into the 3D space with a fully 3D reimagined world, much like the one present in Sun and Moon.
When looking at the franchise’s schedule of releases, Z would have been released around 2015, two years before Sun and Moon.
Evidence for a Third Installment
A third installment in the franchise would have tied up many loose ends in the sixth generation. For example, your defeat of the evil Team Flare and the team’s boss Lysandre was rather underwhelming, with far greater room for additional storytelling in Z.
A third title could have also explored the mysterious AZ, the ultimate weapon, and the supposed Pokémon war in the region. There was considerable room for storytelling, and that likely would have been present in Pokémon Z.
Furthermore, the legendary creature Zygarde also points towards a possible third game with the Pocket Monster criminally underused in X and Y. Instead, the monster had more prominence in Sun and Moon with different forms. Traditionally with three games in each generation, three legendaries get the limelight. Zygarde was supposed to be the third in Generation 6.
The presence of Zygarde in Sun and Moon points towards the possible existence of Z, with it likely its new forms were supposed to feature in a third installment rather than in a whole new generation.
Likewise, Magearna also seems to have been forced into Sun and Moon with the Pocket Monster having a European look resembling the region of X and Y rather than Sun and Moon. Both Zygarde and Magearna seem to have been stuffed into Sun and Moon, pointing towards the existence of Z.
