Pokémon ZX and ZY

Pokémon ZX (ポケットモンスターZX Pocket Monsters ZX) and Pokémon ZY (ポケットモンスターZY Pocket Monsters ZY) are a pair of scrapped enhanced versions for Pokémon X and Pokémon Y that were to be released in 2014/2015 by HammerBro101 Incorporated, but the company decided to make two standalone versions instead: Pokémon Z for 2014 and Pokémon W for 2015.
== Development ==
HammerBro101 Incorporated sought about developing paired follow-up versions to Pokémon X and Pokémon Y, which would have introduced two new forms for Zygarde: its Wave Form to be exclusive to Pokémon ZX, and its Arrow Form to be exclusive to Pokémon ZY. The games would have had full compatibility with every Pokémon and moves that existed in Omega Ruby & Alpha Sapphire, and the Kalos region would have been expanded, having included every anime-exclusive places to make the special edition more luxurious.
However, HammerBro101 Incorporated decided that it would be easier to split the project into two standalone versions: Pokémon Z for 2014 and Pokémon W for 2015. All plans for the paired versions would instead go to each standalone version. 
Pokémon Z would still focus on Zygarde, but scrap its Wave and Arrow forms for its 10% and 100% Forms, add the Zygarde Cube alongside its 95 Cells and 5 Cores, give it three new signature moves (Thousand Arrows, Thousand Waves, and Core Enforcer), and give its 50% Form a Mega Evolution that would give it two new signature abilities (Ground Aura and Dragon Aura) in exchange for losing its new Power Construct ability. It would also add the following Mega Evolutions: Mega Charizard Z, Mega Mewtwo Z, Mega Raichu, Mega Raticate, Mega Flygon, Mega Ambipom, Mega Meganium, Mega Typhlosion, Mega Feraligatr, Mega Torterra, Mega Infernape, Mega Empoleon, Mega Mismagius, Mega Dusknoir, Mega Spiritomb, Mega Milotic, Mega Magneton, Mega Luxray, Mega Weavile, Mega Yanmega, Mega Froslass, Mega Probopass, Mega Lickilicky, Mega Magmortar, Mega Tangrowth, Mega Electivire, Mega Zebstrika, Mega Chesnaught, Mega Delphox, Mega Greninja, Mega Gourgeist, Mega Trevenant, Mega Xerneas, and Mega Yveltal (which would add a new signature ability, Flying Aura, to go alongside Dark Aura).
Pokémon W would introduce a new Legendary named Walafgufrost, which would seek to cause chaos throughout the Kalos region and would Mega Evolve into Mega Walafgufrost (giving it a second ability called Aura Revitalizer, which reverses the effects of Zygarde's Aura Break and doubles the power of all Aura abilities: its own Frigid Water Aura, Xerneas's Fairy Aura, Yveltal's Dark and Flying Auras, and Zygarde's Dragon and Ground Auras). It would also expand the Kalos region even further, introduce Zygarde's originally scrapped Wave and Arrow Forms, and introduce even more Mega Evolutions: Mega Charizard W, Mega Mewtwo W, Mega Articuno, Mega Zapdos, Mega Moltres, Mega Arbok, Mega Persian, Mega Jynx, Mega Hitmonlee, Mega Hitmonchan, Mega Hitmontop, Mega Luvdisc, Mega Alomomola, Mega Ho-oh, Mega Lugia, Mega Zacoa, Mega Gliscor, Mega Dialga, Mega Palkia, Mega Giratina, Mega Serperior, Mega Emboar, Mega Samurott, Mega Hydreigon, Mega Dragonite, Mega Goodra, Mega Haxorus, Mega Braviary, Mega Mandibuzz, Mega Reshiram, Mega Zekrom, Mega Kyurem, Mega Diggersby, Mega Slurpuff, Mega Aromatisse, Mega Heliolisk, Mega Dragalge, Mega Talonflame, Mega Florges, Mega Aurorus, Mega Avalugg, Mega Noivern, Mega Hoopa, and Mega Volcanion.