In the middle of the Canterlu Region, a young girl named Sunset Shimmer is starting her first days as a Pokémon Trainer, with her partner Pokémon, Pyrosaur. As she explores the Canterlu Region, she will meet new friends, make some rivals, and even battle an organization known as Team Nova Galactic, led by one of Cyrus's old lieutenants, Venus, whose goal is to use the power of the mighty Ultra-Beasts for their own dark agenda.

Sunset will face any challenge in order to eventually become a Pokémon Master.