Season 8

Season 8 of GO Battle League lasted from May, 2021 to August , 2021. It is preceded by Season 7 and succeeded by Season 9. This GO Battle League Season ran concurrently with Season of Discovery.

In this Season, Element Cup, Bidoof Cup and Ultra League Remix were introduced.

Formats
Great League Remix: 1,500 CP limit. Top 20 Pokémon banned.

Ultra League Remix: 2,500 CP limit. Top 20 Pokémon banned.

Element Cup: 500 CP limit. Only Fire-, Water-, and Grass-types allowed. Only Pokémon that can evolve and that are the first in their Evolutionary line.

Choose Bidoof!: 500 CP limit. Only Bidoof allowed. Available only on July, 2021.

Ranks and Ratings
The requirements were different from Season 7.

Rewards
Basic Premium
 * Rank 5: Mysterious Item
 * Rank 10: 750 (Basic) / 1500 (Premium) Stardust
 * Rank 15: 1 (Basic) / 2 (Premium) Rare Candy
 * Rank 19: Pokémon Encounter
 * Other ranks:

Stardust

The random items can include:
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Reaching rank 19 awarded:

Reaching Ace rank and above awarded avatar items and an avatar pose inspired by Korrina from Pokémon X and Y.

Pokémon
Guaranteed first Pokémon encounters:
 * Machamp: rank 1 (one only)
 * Mienfoo: rank 5
 * Current Legendary Raid boss: rank 20
 * Gible: Veteran rank
 * Deino: Expert rank
 * Pikachu Libre: Legend rank (one only)

These Pokémon were released at the start of the Season:

Tier 5 Raid Bosses could be obtained starting at rank 20 during their time in raids.

End-of-Season rewards

 * (rank 19 or above)

June, 2021
GO Battle Night took place on June, 2021 from 6 p.m. to 11:59 p.m. local time. Great League was available during this GO Battle Night.

July, 2021
GO Battle Night took place on July, 2021 from 6 p.m. to 11:59 p.m. local time. Master League, Master League Classic and Element Cup were available during this GO Battle Night. Stardust bonus during GO Battle Night did not combine with the 2× Stardust bonus that was active from June to July, 2021.

August, 2021
GO Battle Night took place on August, 2021 from 6 p.m. to 11:59 p.m. local time. Great League, Ultra League and Master League were available during this GO Battle Night.

Attack updates
These Attack updates went live at the start of the Season:

Attack changes

 * Acid Spray: Energy cost decreased from 50 to 45 in Trainer Battles.
 * Poison Jab: Base power increased from 6 to 7 in Trainer Battles.
 * Poison Sting: Energy gain increased from 8 to 9 in Trainer Battles.
 * Cross Poison: Base power increased from 40 to 50 and 12.5% chance to increase the user's Attack by 2 stages in Trainer Battles.
 * Poison Fang: 100% chance to lower the opponent's Defense by 1 stage in Trainer Battles.
 * Dragon Tail: Base power increased from 9 to 13 and energy gain reduced from 10 to 9 in Trainer Battles.
 * Focus Blast: Base power increased from 140 to 150 in Trainer Battles.

Attack availability
Some Pokémon received new Attacks to their standard Attack pools:

Trivia

 * Bidoof was available as the Legendary Pokémon encounter at Rank 20 for one day on July, 2021.