Pokemon Go developer Scopely has revealed new details on the game’s next season, Tales of Transformation. The season will start on September 2 and will run through December 2, with some of the highlights including a new transformation for a legendary Pokemon, more Mega Pokemon, and a few new pocket monsters will be coming to the game.

Kicking things off is confirmation that Keldeo will be able to transform into its Resolute Form during a season-long Special Research journey. In the Pokemon games, this form gives the mythical Pokemon more power and speed, and players who have already caught Keldeo can earn Keldeo Candy to power it up further.

Fans of Mega Pokemon can look forward to Mega Raid Days throughout the season, as Mega Sharpedo, Mega Camerupt, and Mega Metagross will all appear during this event. There’ll also be new Dynamax and Gigantamax Pokemon appearing during Tales of Transformation, like Dynamax Abra, Dynamax Duraludon, and Gigantamax Garbodor. Anyone looking to capture some new critters can also hunt for Dripplin and Hydrapple next month.

Dripplin was introduced in the Teal Mask expansion for Pokemon Scarlet and Violet, and when certain conditions are met, it evolves into the Grass- and Dragon-type Pokemon Hydrapple. It’s the third branch of potential evolutions for Applin, the apple-inspired Pokemon that can also evolve into Flapple and Appletun.

Finally, players looking for a real challenge can take part in Shadow Raids to face off against Shadow Groudon and several other Shadow Pokemon.

Later this year, Pokemon Go will also overhaul progression. Starting October 15, a new update will see the level cap raised, increased rewards, and much more added to the game.