Ash reunites with his Greninja.
Goh's Froakie evolves into Frogadier.
Shinji Miyazaki's music from Pokémon the Series: Black & White and Pokémon the Series: XY is reused as background music in this episode.
This episode marks the first appearance of Ash's Greninja since Farewell, Satoshi Gekkouga! Xerosicy's Counterattack!! (2016), 254 episodes earlier.
This episode marks the first time one of Ash's released Pokémon makes a physical appearance outside of the series it was released in.