Satoshi, Go, and Koharu are invited to be special guests in a Pokémon circus. At the site of the event, the two performers, Honoka, who likes Fire types, intends on evolving her Eievui into a Booster. Meanwhile, Billy, who likes Electric types, plans to evolve his Eievui into a Thunders. However, the performers accidentally evolve their Pokémon into the opposite forms. Despite a few obstacles, Honoka and Billy are able to pull of a successful show. Koharu is given a Thunder and Fire stone for potential use in the future. (Source: Wikipedia)
