LGPE Pre-release 2018
Sep 10 - Secret Techniques, Customization, Partner Power Special Moves, Celadon Game Corner changed into an arcade, Special Edition Pikachu/Eevee Switch
Sep 13 - [Nintendo Direct] S.S. Anne, Riding Rapidash/Dodrio
Sep 15 - Mew
Sep 19 - Pokemon GO connectivity, GO Park, Legendary Birds
Sep 25 - Meltan
USUM Pre-release 2017
Sep 13 - [Nintendo Direct] Necrozma Formes, UB-Burst, UB-Assembly
Sep 22 - Around 400 Pokemon in Alola Dex confirmed, Mantine Surf, Alola Photo Club, Mina's Trial, A-Marowak is now a Totem, New version-exclusive Pokemon
SM Pre-release 2016
Sep 01 - [Nintendo Direct] A-Rattata, Snorlium Z/Pulverizing Pancake
Sep 06 - UB-01, Type:Null, Jangmo-o, A-Raticate, Aether Foundation, Lusamine, Faba, Wicke, Gladion, Poke Finder
Sep 08 - Samson Oak
Sep 14 - UB-02 Absorption, UB-02 Expansion
Sep 20 - Customization, Passimian, Oranguru, Lycanroc (and forms), PokeBank Update for Gen 7
ORAS Pre-release 2014
Sep 04 - Diving, Wild Pokemon tail in grass, Pre-order details
Sep 12 - Mega (Gallade, Sharpedo, Camerupt), Primal Groudon/Kyogre abilities, Global Link & Bank compatibility, Soundtrack, Special Edition 3DS
XY Pre-release 2013
Sep 04 - [Pokemon Direct] Pokemon Bank, Poke Transporter, Kanto Starters (and their Megas)
Sep 12 - Pyroar
Sep 13 - Quilladin, Braixen, Frogadier, Tyrunt, Amoura, Furfrou, Meowstic, Mega (Mewtwo X, Garchomp), Team Flare Admins (Celosia, Aliana, Bryony, Mable, Xerosic), Diantha
Sep 18 - eShop Trailer that didn't showcase much
Sep 19 - Tyrantrum, Aurorus, Confirmation of no Megas for Gen 6 Pokemon
Sep 25 - Doublade