Niantic has announced the 6th anniversary event details which will take place from Wednesday, July 6th, 2022, at 10:00 a.m. to Tuesday, July 12th, 2022, at 8:00 p.m. local time.

Celebrate six years of Pokémon GO during the Anniversary Event and Battle Weekend!

Trainers,
It’s time to celebrate Pokémon GO and party like it’s 2016! To help kick this anniversary into high gear, we’re having a sensational six-themed celebration—including a special emphasis on Charizard, which is #006 in the Pokedéx. With event-themed Field Research and a Battle Weekend taking place, there’ll be plenty of fun for Trainers everywhere to enjoy!

What’s more, our intel suggests there may be components to this event that will only be revealed after certain Ultra Unlock conditions are met. Could Pokémon GO Fest: Berlin have something to do with this?

Pokémon GO Anniversary Event

Wednesday, July 6, 2022, at 10:00 a.m. to Tuesday, July 12, 2022, at 8:00 p.m. local time

Pokémon debuts

Party Hat Charmeleon, Party Hat Charizard, and Cake Costume Pikachu will make their Pokémon GO debuts! This is also the first time Trainers will be able to evolve their Party Hat Charmanders! If you’re lucky, you may even encounter Shiny Party Hat Charmeleon and Shiny Party Hat Charizard!


: If you’re lucky, you might encounter a Shiny one!

Wild encounters

The following Pokémon will appear more frequently in the wild.


Bulbasaur , Party Hat Charmander , Squirtle , Cake Costume Pikachu , Machop , Ledyba , Ralts , Buneary , Venipede, Chespin, Fennekin, Froakie, Bunnelby , Litleo, Pikipek
If you’re lucky, you might encounter the following: Gabite, Clauncher, Helioptile

: If you’re lucky, you might encounter a Shiny one!

Raids

The following Pokémon will be appearing in raids.


One-Star Raids: Cake Costume Pikachu , Dratini
Three-Star Raids: Venusaur , Party Hat Charizard , Blastoise , Tyranitar, Metagross
Five-Star Raids: Zapdos
Mega Raids: Mega Charizard X **, Mega Charizard Y ***

: If you’re lucky, you might encounter a Shiny one!
**Mega Charizard X will appear in Raid battles on Wednesday, July 6, 2022, and Thursday, July 7, 2022.
***Mega Charizard Y will appear in Raid battles from Thursday, July 7, 2022, to Tuesday, July 12, 2022.

Field Research task encounters

You can encounter the following Pokémon when you complete Field Research tasks!


Bulbasaur , Charmander , Squirtle , Chikorita , Cyndaquil , Totodile , Treecko , Torchic , Mudkip , Turtwig , Chimchar , Piplup , Snivy , Tepig , Oshawott , Chespin, Fennekin, Froakie, Rowlet, Litten, Popplio
: If you’re lucky, you might encounter a Shiny one!

New avatar items and stickers

The following avatar items will be available to purchase in the in-game shop during this event and will continue to be available after the event ends!

Sixth anniversary avatar items

You’ll also be able to get event-themed stickers by spinning PokéStops, opening Gifts, and purchasing them from the in-game shop.

Battle Weekend

From Saturday, July 9, 2022, at 12:00 a.m. to Sunday, July 10, 2022, at 11:59 p.m. local time

Event bonuses

: Team GO Rocket balloons will appear every three hours.
: Enjoy up to 20 GO Battle League sets each day.
: Earn 4× Stardust from GO Battle League Rewards.
: Use a Charged TM to help a Shadow Pokémon forget the Charged Attack Frustration.

Save Shadow Latios!

Giovanni doesn’t do anything halfway. After Trainers around the world saved Shadow Latias, the Team GO Rocket boss just had to get his hands on Shadow Latios—and now it needs your help! Get ready to face off against Giovanni and rescue Shadow Latios!

Shadow Pokémon

Team GO Rocket Grunts—as well as their leaders, Sierra, Cliff, and Arlo—are also using different Shadow Pokémon. Help Spark, Blanche, and Candela overcome their adversaries and rescue the Shadow Pokémon! If you’re lucky, you may encounter different Shiny Shadow Pokémon than normal, too!

In addition, Team GO Rocket has also turned the following Pokémon into Shadow Pokémon. Defeat Team GO Rocket Grunts to save them!

Special Research

Special Research centered on Giovanni will be available. Complete it to earn Super Rocket Radar! The Special Research will be available to claim until the end of the Season of GO on September 1, 2022, at 10:00 a.m. local time.

Please be aware of your surroundings and follow guidelines from local health authorities when playing Pokémon GO. Upcoming events are subject to change.

Source: https://pokemongolive.com/en/post/gofest2022-berlin-ultraunlockchallenge/