All three Season 1 GO Battle leagues now available in Pokémon GO until May 1 at 1 p.m. PDT

Pokémon GO Battle League Season 1 recently kicked off. Read on below to learn more:

GO Battle League Season 1 started on Friday, March 13, 2020, at 1:00 p.m. PDT (GMT −7)

• We’re fine-tuning the GO Battle League’s rewards. Depending on your rank, you’ll receive increased Stardust rewards and a different number of Charged and Fast TMs.
• Winning matters much earlier in the ranks now. Ranks 2 and 3 now require you to win a certain number of battles to advance to the next rank. Previously, wins mattered only beginning at rank 4.
• The Pokémon you can encounter as GO Battle League rewards will change for Season 1. Metagross will be your guaranteed first encounter reward for Season 1. At rank 4, you’ll have a chance to encounter Beldum. At rank 7, you’ll have a chance to encounter Rufflet, making its Pokémon GO debut ahead of appearing in Safari Zone Philadelphia. And last but not least, the tough Pikachu Libre will be making its debut as a guaranteed reward encounter when you reach rank 10! In the future, Pikachu Libre will be available starting at lower ranks, but this season is your chance to challenge yourself to see if you can make it to rank 10, Trainers. Machop, Snorlax, and Meditite will no longer appear as GO Battle League encounters, but you’ll encounter Scraggy more often. These reward encounters might change next season, so be sure to give it your all and climb as high as you can in the rankings, Trainers!
• Reach rank 10 to earn avatar items and an avatar pose inspired by Steven. Steven is a Pokémon League Champion in the Hoenn region. Steven is both an incredibly skilled Pokémon Trainer and a kind and helpful mentor. His dedication to battle makes his avatar items and avatar pose rewards a perfect match for the GO Battle League. The pose is a reward exclusive to Season 1. As of April 23, any Trainers in rank 10 will receive their Steven-inspired avatar item and pose rewards after they finish their next Go Battle League set during Season 1.
• At the end of Season 1, you’ll receive an Elite Charged TM if you’ve reached Rank 7 or higher. Introducing Elite Charged TMs and Elite Fast TMs! By using an Elite Charged TM or Elite Fast TM, you’ll be able to select the attack that your Pokémon learns. Not only that, but Elite Charged TMs and Elite Fast TMs will also allow Pokémon to learn attacks previously available only during events such as Raid Days or Community Days.

GO Battle League Season 1 timeline

Season 1 will rotate through leagues, just like the preseason did. Season 2 is set to begin in early May, but please note that all these dates are still tentative. Stay tuned—we’ll update you as soon as anything changes.

• The Great League will run from Friday, March 13, 2020, at 1:00 p.m. to Friday, March 27, 2020, at 1:00 p.m. PDT (GMT −7).
• The Ultra League will run from Friday, March 27, 2020, at 1:00 p.m. to Friday, April 10, 2020, at 1:00 p.m. PDT (GMT −7).
• The Master League will run from Friday, April 10, 2020, at 1:00 p.m. to Friday, April 24, 2020, at 1:00 p.m. PDT (GMT −7).
• All three leagues will be available from Friday, April 24, 2020, at 1:00 p.m. to Friday, May 1, 2020, at 1:00 p.m. PDT (GMT −7).
• Season 2 will begin Friday, May 1, 2020, at 1:00 p.m. PDT (GMT −7).

Source: Official Pokémon GO blog