This new season will run from Monday, March 1, 2021, at 8:00 a.m. to Tuesday, June 1, 2021, at 10:00 a.m. local time and celebrates legendary Pokemon and legendary Trainers!
More Pokémon will make their Pokémon GO debut in Legendary Raids and Mega Raids!
Therian Forme Tornadus, Therian Forme Thundurus, and Therian Forme Landorus will make their Pokémon GO debut plus more to be announced.
Tornadus (Therian Forme) 
Thundurus (Therian Forme) 
Landorus (Therian Forme)
Different Mega-Evolved Pokémon will be appearing in Mega Raids, and other Mega-Evolved Pokémon will be making their Pokémon GO debut.
Different Pokémon will be appearing in the wild!
As the seasons change, different kinds of Pokémon will be appearing in different habitats in the wild! For example, you might find Mantine or Frillish appearing near water, or maybe you’ll happen upon a Voltorb or Glameow while in the city! If you happen to be traversing near grassy and forested areas, you might find Hoppip floating peacefully in the air. These and many more Pokémon will be appearing more often in the wild, so keep a lookout and stay tuned for more details!
Hemisphere-exclusive Pokémon
In the northern hemisphere, you’ll be able to encounter Pokémon like Tangela, Combee, Croagunk, Ducklett, and many more in the wild! First partner Pokémon originally discovered in the Sinnoh region—Turtwig, Chimchar, and Piplup—will also be appearing in the wild, alongside Spring Form Deerling. If you’re extremely lucky, you might even encounter Pokémon such as Scyther, Dratini, or Cottonee in the wild!
In the southern hemisphere, Pokémon like Mankey, Yanma, Buizel, Woobat, and many more will be appearing in the wild, alongside first partner Pokémon originally discovered in the Unova region—Snivy, Tepig, and Oshawott! If you’re extremely lucky, you might encounter a Pineco, Bagon, or Ferroseed. Keep your eyes out for Autumn Form Deerling, too!
Different Pokémon will be hatching from Eggs!
Pokémon like Treecko, Torchic, Mudkip, Budew, and more will be hatching from 2 km Eggs. Drowzee, Azurill, and Munna will be hatching from 5 km Eggs, and intrepid Trainers might find Nincada, Alomomola, and more hatching from 10 km Eggs!
Season-exclusive Special Research
Toward the start of the season, all Trainers will be able to access the Season of Legends Special Research. Follow Professor Willow as he makes exciting discoveries about Therian Forme Tornadus, Therian Forme Thundurus, and Therian Forme Landorus, the first three Legendary Pokémon featured during this Season. Complete this Special Research to earn Tornadus, Thundurus, and Landorus Candy as well as other rewards.
Be on the lookout for bonuses and items throughout the Season!
Players can receive increased XP from five-star raids throughout this Season only. Free Remote Raid Passes will be available at certain times during the Season.
