https://pokemongolive.com/post/gobattleleague-season9/Quick Summary:
First of all, FINALLY INFOGRAPHICS! You can actually read about what's going on without squinting! Hope more updates are like this.
Basic Updates:
>GO Battle Nights changed GO Battle Days, because who has that kind of time after school/work? (100 sets + 4x stardust) on 09/18, 11/01, and 11/20.>Leon clothes and guaranteed Charizard. Oddly, the pose won't be available until "midway through season 9".>Encounters aren't great, but Rhydon and Litwick at rank 11+ and Noibat at Veteran are okay.>Great League Remix now top 10, so Kanto starters are back in.>Little Jungle Cup: Little Cup with Normal, Grass, Electric, Poison, Ground, Flying, Bug, and Dark-type Pokémon. Smeargle and Shuckle are banned.>Halloween Cup: Great League with Poison, Bug, Ghost, Dark, and Fairy-type Pokémon.>Additional old cup based on popular demand!Move Reworks:
>Weather Ball nerfed from 60 dmg to 55 dmg in PvP AND PvE (you lost Mega Abomasnow-bros)>Crunch can now lower opponent's defense.>Zap Cannon WILL lower opponent's attack.>Scald now costs less and can lower opponent's attack.>Feather Dance costs more.>Megahorn deals 110 instead of 100 (?).>Nidoking gets Sand Tomb (presumably to compete with Nidoqueen).>Poliwrath gets Scald.>Heracross gets Rock Blast.>Manetric gets Thunder Fang and Overheat.>Cofagrigus gets Shadow Claw (We did it bros!).