SM091: A Plethora of Pikachu!

- (大量発生チュウ！ピカチュウのたに! !) is the 48th episode of Pokémon the Series: Sun & Moon - Ultra Adventures.

Synopsis
Ash and the gang visit the Pikachu Valley where the Pikachu live in masses. When there, there appears to be one who really enjoy things about the Pikachu and spend time in the valley -- they receive welcome from this kind of an unknown lady known as "Pikarla". They closely become friends with the woman, however the active Rocket gang has their focus on the Pikachu.

Trivia

 * This is the first episode to air on Sundays at 6:00 PM on TV Tokyo in Japan.