Niantic has announced the GO Battle League Season 7 begins on Monday, March 1st, 2021, at 1:00 p.m. PST (GMT −8).

GO Battle League Season 7 begins Monday, March 1, 2021, at 1:00 p.m. PST (GMT −8)

Trainers, Is there a more apt time for Season 7 of the GO Battle League to begin than with the Season of Legends? We’re excited to share how this GO Battle League season will be the most legendary one yet! As we continue to work on bringing interesting and competitive experiences to the GO Battle League, you can look forward to new cups that upend team expectations in familiar leagues and a surprise sometime between Monday, March 29, 2021, at 1:00 p.m. to Monday, April 5, 2021, at 1:00 p.m. PDT (GMT −7).

Season 6 rewards, Season 7 timeline, and what to expect
When Season 7 begins on Monday, March 1, 2021, at 1:00 p.m. PST (GMT −8), your end-of-season rewards for Season 6 will be available on the Battle screen, including an Elite Fast TM if you reached rank 19 or higher. Your rating will be reset. Stay tuned—we’ll update you if anything changes.

• The Great League will run from Monday, March 1, 2021, at 1:00 p.m. PST (GMT −8) to Monday, March 15, 2021, at 1:00 p.m. PDT (GMT −7).
• The Ultra League and its Premier Cup will run from Monday, March 15, 2021, at 1:00 p.m. to Monday, March 29, 2021, at 1:00 p.m. PDT (GMT −7).
• The Master League, Master League Classic, and the Great League will run from Monday, March 29, 2021, at 1:00 p.m. to Monday, April 5, 2021, at 1:00 p.m. PDT (GMT −7). Only Pokémon that haven’t been powered up with Candy XL are allowed in Master League Classic.
• All three leagues will run from Monday, April 5, 2021, at 1:00 p.m. to Monday, April 12, 2021, at 1:00 p.m. PDT (GMT −7).
• The Great League and a new cup called Great League Remix will run from Monday, April 12, 2021, at 1:00 p.m. to Monday, April 26, 2021, at 1:00 p.m. PDT (GMT −7). See the Cups section below for more details.
• The Ultra League and its Premier Cup will run from Monday, April 26, 2021, at 1:00 p.m. to Monday, May 10, 2021, at 1:00 p.m. PDT (GMT −7).
• The Master League, Master League Classic, and the Retro Cup will run from Monday, May 10, 2021, at 1:00 p.m. to Monday, May 17, 2021, at 1:00 p.m. PDT (GMT −7). Only Pokémon that haven’t been powered up with Candy XL are allowed in Master League Classic. See the Cups section below for more details.
• All three leagues will run from Monday, May 17, 2021, at 1:00 p.m. to Monday, May 24, 2021, at 1:00 p.m. PDT (GMT −7).
• Ranked play will end on Monday, May 24, 2021, at 1:00 p.m. PDT (GMT −7).
• An unranked Kanto Cup will run from Monday, May 24, 2021, at 1:00 p.m. to Monday, May 31, 2021, at 1:00 p.m. PDT (GMT −7). See the Cups section below for more details.

Season 7 will have the same rank structure as Season 6.

What’s new in Season 7?
There are some notable changes coming to the GO Battle League during Season 7.

• You won’t want to miss these Season 7 rewards. The Pikachu Libre avatar items will be a reward for Trainers who reach rank 10. Trainers who reach Legend rank will earn avatar items and a pose inspired by Elesa, who made her first appearance in Pokémon Black Version and Pokémon White Version. At rank 19, you’ll receive an Elite Charged TM, and you’ll also receive an Elite Fast TM as an end-of-season reward.
• Some of the Pokémon you’ll encounter as you reach certain ranks will be inspired by Elesa. Additionally, players who reach rank 20 are guaranteed to encounter the Legendary Pokémon that is appearing in five-star raids at that time.
• Rank 1: You’ll be guaranteed to encounter Zebstrika, one of Elesa’s partner Pokémon in the Pokémon RPGs.
• Rank 1 and up: You’ll be able to encounter Pokémon such as Poliwhirl, Flaaffy, Pupitar, Galvantula, and more.
• Rank 10 and up: You’ll be able to encounter Pokémon such as Medicham, Frillish, Stunfisk, and more.
• Rank 15 and up: You’ll be able to encounter Pokémon such as Scraggy, Lampent, and Rufflet. Don’t forget—if you’re lucky, you might encounter a Shiny Rufflet!
• From rank 20 and up: You’ll be able to encounter the Legendary Pokémon that is appearing in five-star raids at that time.
• Ace rank and up: You’ll be able to encounter Deino!
• Legend rank: You’ll be guaranteed to encounter a Pikachu Libre. This will be the only time you’ll be able to encounter a Pikachu Libre during the season.
• You’ll earn more Candy XL than normal when you catch these Pokémon in GO Battle League reward encounters: Poliwhirl, Flaaffy, Pupitar, Medicham, Scraggy, Galvantula, Lampent, and Stunfisk.
• Stay tuned for details on the GO Battle League cups to be featured in the second half of Season 7.

Cups
You can look forward to the following cups this season!

• Great League Remix: The 10 most-used Pokémon in the Great League will not be allowed in this version of the league. We’ll share the list of ineligible Pokémon shortly after the Great League ends on March 15. We’re excited to see which Pokémon will emerge as the rising stars of Great League Remix!
• Retro Cup: This cup will be a throwback!! Only the first 15 Pokémon types, excluding Dark, Steel, and Fairy types, will be usable in this cup, and the CP limit will be 1,500.
• Kanto Cup: The CP limit for this cup will be 1,500, and only Pokémon with a Pokédex number from #001 to #151 will be allowed. You rating won’t be affected during the Kanto Cup, so feel free to get creative!

And one more thing! We’ve decided that the previous walking requirement to unlock battles will not return to the GO Battle League.

Stay tuned for more updates on GO Battle League Season 7, including some Trainer Battle attack updates. Please be aware of your surroundings and follow guidelines from local health authorities when playing Pokémon GO. Upcoming events are subject to change.

UPDATE (3/29/2021): We have some details to share regarding attack updates coming to Trainer Battles in Season 7 of the GO Battle League! These changes will be implemented on Monday, April 12, 2021, at 1:00 p.m. PDT (GMT −7).

The following attacks will be added to Pokémon GO.

• Leaf Storm: This powerful Grass-type Charged Attack will decrease your Pokémon Attack stat after use. Sunflora, Celebi, Ludicolo, Roserade, and Leavanny will be able to learn Leaf Storm.

The following attack will be available to Pokémon that couldn’t learn them before.

• Payback: Persian, Alolan Persian, Cacnea, Cacturne, Absol, Bronzor, Bronzong, and Liepard will now able to learn this powerful Dark-type Charged Attack.

UPDATE 4/5/2021: The list of the most-used Pokémon in the Great League is here! These Pokémon will not be allowed in the Great League Remix, which will run from Monday, April 12, 2021, at 1:00 p.m. to Monday, April 26, 2021, at 1:00 p.m. PDT (GMT −7).

1. Venusaur
2. Raichu and Alolan Raichu
3. Marowak and Alolan Marowak
4. Azumarill
5. Umbreon
6. Skarmory
7. Swampert
8. Galvantula
9. Stunfisk and Galarian Stunfisk
10. Talonflame

We’re excited to see which Pokémon will emerge as the stars of Great League Remix! Good luck, Trainers!

Source: https://pokemongolive.com/post/gobattleleague-season7/?hl=en