Niantic has announced the GO Battle League: Interlude Season which will start on Tuesday, March 1st, 2022, at 1:00 p.m. PST (GMT –8) and end on Wednesday, June 1st, 2022, at 1:00 p.m. PDT (GMT –8).

GO Battle League: Interlude Season

Trainers,
The next Season of the GO Battle League is here, and it’s a Season like we’ve never had before! As we mentioned previously, upon Season 10’s conclusion, the GO Battle League will move into an Interlude Season.

The Interlude Season Start Date, Rank Resets, and End-of-Season Rewards

Season 10 will be extended until Tuesday, March 1, 2022, at 1:00 p.m. PST (GMT –8). Immediately following that, the GO Battle League’s Interlude Season will start on Tuesday, March 1, 2022, at 1:00 p.m. PST (GMT –8) and end on Wednesday, June 1, 2022, at 1:00 p.m. PDT (GMT –8).

• End-of-season rewards will be available on the battle screen.
• Your GO Battle League rank will be reset.
• Rank-up requirements will remain the same as in Season 10.
• Rankings will cap at rank 20, and there will be no visible ratings.

The Interlude Season Schedule

This Interlude Season will feature a weekly league rotation schedule and will bring back some cups from previous Seasons!

In the following list, leagues and cups that take place on or before March 12 will begin and end at 1:00 p.m. PST (GMT −8), while those that occur on or after March 13 will begin and end at 1:00 p.m. PDT (GMT −7).

Timed Research Ticket: BATTLE

For our most dedicated battlers, a Timed Research ticket will be available in the shop for free once the Interlude Season begins.

This Timed Research will keep track of your victories throughout the Season. Each research page will require progressively more wins to complete, and doing so will reward you with a small amount of Stardust. Keep at it throughout the Season to see how far you can get!

Interlude Season GO Battle Days - GO Battle Day: Seel

Saturday, March 5, 2022

A GO Battle Day featuring Seel, plus the return of two featured attacks for its Evolution, Dewgong!

The maximum number of sets you can play per day will be increased from five to 20—for a total of 100 battles—from 12:00 a.m. to 11:59 p.m. local time.

Bonuses

Available from 11:00 a.m. to 2:00 p.m. local time

• In each set, the first win reward from the Basic track will be a reward encounter. The second through fifth win rewards will remain unchanged.
• All win rewards from the Premium track will be reward encounters.

Evolve Seel to get a Dewgong that knows the Fast Attack Ice Shard
Evolve Seel to get a Dewgong that knows the Charged Attack Icy Wind

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

End-of-Set Avatar Rewards

Trainers who complete a set at any rank during this GO Battle Day will receive the Gladion’s Shoes avatar item!*

* Trainers who have already received the Gladion’s Shoes avatar item from the rank 20 rewards will not receive another.

GO Battle Day: Beginner’s Paradise

Sunday, April 17, 2022, from 12:00 a.m. to 11:59 p.m. local time

With the beginner-friendly Great League and Little Cup active, XP from Timed Research available, and an avatar item up for grabs, there’s never been a better time to try out the GO Battle League!

The maximum number of sets you can play per day will be increased from five to 20, for a total of 100 battles!

Bonuses

Timed Research will be available that rewards a large amount of XP!

End-of-Set Avatar Rewards

Trainers who complete a set at any rank during this GO Battle Day will receive the Gladion's Hoodie avatar item!*

* Trainers who have already received Gladion's Hoodie from the rank 20 rewards will not receive another.

Active Cups

The following competitions will be active.

• Great League
• Little Cup

GO Battle Day: Mega Stardust Surprise

Sunday, May 29, 2022, from 12:00 a.m. to 11:59 p.m. local time

A GO Battle Day featuring the standard Stardust bonuses. We may also have a Mega surprise in store for you!

The maximum number of sets you can play per day will be increased from five to 20, for a total of 100 battles!

Bonuses

• 4× Stardust from win rewards.
• A Mega Surprise!

End-of-Set Avatar Rewards

Trainers who complete a set at any rank during this GO Battle Day will receive the Gladion’s Pants avatar item!*

* Trainers who have already received Gladion’s Pants from the rank 20 rewards will not receive another pair.

Active Cups

The following leagues will be active.

• Master League
• Ultra League
• Great League

Season Rewards

Guaranteed rank-up encounters
You can encounter the following Pokémon once per season at the designated ranks. At rank 1, you’ll be guaranteed to encounter one of the Pokémon that Gladion is known to use!


*Shiny Pikachu Libre will not be available to encounter during this Season.

Standard Encounters

You can encounter the following Pokémon in reward encounters throughout the season at the ranks shown in the image below.


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

: The Pokémon currently appearing in five-star raids has a chance of appearing as a reward encounter after you reach rank 20.

Avatar items and other rewards

Pikachu Libre avatar items will be rewarded to Trainers who reach Rank 3.


Trainers will be able to earn avatar items and a pose inspired by an enforcer of Team Skull, Gladion, who first appeared in the Pokémon Sun and Pokémon Moon games!

In celebration of the Season of Alola and the GO Battle League Interlude Season, the entire Gladion avatar item set will be available to those who reach rank 20 this season!

• Rank 20: Gladion Cuff Earrings
• Rank 20: Gladion Shoes*
• Rank 20: Gladion Pants*
• Rank 20: Gladion Hoodie*
• Rank 20: animated Gladion Pose

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


* Trainers who have already received Gladion’s Shoes, Hoodie, or Pants from GO Battle Day rewards will not receive duplicates.

Cups

You can look forward to the following cups this season.

Great League - Pokémon must be at or below 1,500 CP to enter.
Ultra League - Pokémon must be at or below 2,500 CP to enter.
Ultra League Premier Classic

• Pokémon must be at or below 2,500 CP to enter.
• Legendary or Mythical Pokémon are not eligible.
• Pokémon that have been powered up using Candy XL are not eligible.

Master League - No CP Limit.
Master League Premier Classic

• No CP Limit.
• Legendary or Mythical Pokémon are not eligible.
• Pokémon that have been powered up using Candy XL are not eligible.

Johto Cup

• Pokémon must be at or below 1500 CP to enter.
• Only Pokémon with a Pokédex number from #152 to #251 will be allowed.

Love cup

• Pokémon must be at or below 1,500 CP to enter.
• Legendary or Mythical Pokémon are not permitted.
• Only red or pink Pokémon will be allowed.
• Eligible Red Pokémon: Charmander, Charmeleon, Charizard, Vileplume, Paras, Parasect, Krabby, Kingler, Voltorb, Electrode, Goldeen, Seaking, Jynx, Magmar, Magikarp, Flareon, Ledyba, Ledian, Ariados, Yanma, Scizor, Slugma, Magcargo, Octillery, Delibird, Porygon2, Magby, Torchic, Combusken, Blaziken, Wurmple, Medicham, Carvanha, Camerupt, Solrock, Corphish, Crawdaunt, Sunny Form Castform, Kricketot, Kricketune, Trash Cloak Burmy, Trash Cloak Wormadam, Magmortar, Porygon-Z, Rotom, Tepig, Pignite, Emboar, Pansear, Simisear, Throh, Venipede, Scolipede, Krookodile, Darumaka, Darmanitan, Dwebble, Crustle, Scrafty, Autumn, Form Deerling, Shelmet, Accelgor, Druddigon, Pawniard, Bisharp, Braviary, Heatmor, Fennekin, Braixen, Delphox, Fletchling, Fletchinder, Talonflame, Litten, Torracat, Incineroar
• Eligible Pink Pokémon: Clefairy, Clefable, Jigglypuff, Wigglytuff, Slowpoke, Galarian Slowpoke, Slowbro, Galarian Slowbro, Exeggcute, Lickitung, Chansey, Mr. Mime, Porygon, Cleffa, Igglybuff, Flaaffy, Hoppip, Slowking, Galarian Slowking, Snubbull, Corsola, Smoochum, Miltank, Blissey, Whismur, Skitty, Milotic, Gorebyss, Luvdisc, Cherubi, Sunshine Form Cherrim, Mime Jr., Happiny, Lickilicky, Mesprit, Munna, Musharna, Audino, Spring Form Deerling, Alomomola, Spritzee, Aromatisse, Sylveon

Little Jungle Cup

• Pokémon must be at or below 500 CP to enter.
• Pokémon do not need to be able to evolve to enter.
• Only Normal-, Grass-, Electric-, Poison-, Ground-, Flying-, Bug-, and Dark-type Pokémon are permitted.
• Shuckle and Smeargle are not permitted.

Catch Cup

• Pokémon must be at or below 1,500 CP to enter.
• Only Pokémon that have been caught during the duration of this cup are eligible.
• Mythical Pokémon are not eligible.

Halloween Cup

• Pokémon must be at or below 1,500 CP to enter.
• Only Poison-, Bug-, Ghost-, Dark-, and Fairy-type Pokémon are eligible.

Retro Cup

• Pokémon must be at or below 1,500 CP to enter.
• Steel-, Dark-, and Fairy-type Pokémon are not eligible.

Kanto Cup

• Pokémon must be at or below 1,500 CP to enter.
• Only Pokémon with a Pokédex number from #1 to #151 are eligible.

Flying Cup

• Pokémon must be at or below 1,500 CP to enter.
• Only Flying-type Pokémon are eligible.

Little Cup

• Pokémon must be at or below 500 CP to enter.
• Pokémon must be able to evolve to be eligible.

Element Cup

• Pokémon must be at or below 500 CP to enter.
• Only Fire-, Grass-, and Water-type Pokémon are eligible.
• Only Pokémon that are able to evolve and have not evolved even once are eligible.

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/go-battle-league-interlude-season/