For X and Y, by August 7th we had...
- Chespin
- Fennekin
- Froakie
- Xerneas
- Yveltal
- Sylveon
- Mega Mewtwo Y
- Gogoat
- Fletchling
- Helioptile
- Pancham
- Noivern
- Vivillon
- Skrelp
- Clauncher
- Talonflame
- Scatterbug
- Spewpa
- Litleo
- Flabebe
- Honedge
- Pangoro
- Inkay
- Malamar
- Spritzee
- Swirlix
- Trevenant
Of course, the games came out in mid-October, so the publicity cycle's one month advanced. I left off the Coro Coro August reveals to compensate- (Mega Blaziken, Mega Lucario, Mega Ampharos, Mega Absol, Mega Mawile, Bunnelby, Dedenne, Skiddo)
Not an enormous difference to the Sword/Shield pace of reveals.
- Grookey
- Scorbunny
- Sobble
- Wooloo
- Drednaw
- Corviknight
- Gossifleur
- Eldegoss
- Zacian
- Zamazenta
- Yamper
- Impidimp
- Alcremie
- Rolycoly
- Duraludon
- Gigantamax Alcremie
- Gigantamax Corviknight
- Gigantamax Drednaw
- Galarian Weezing
- Galarian Zigzagoon
- Galarian Linoone
- Obstagoon
- Morpeko