Ash's Froakie evolves into Frogadier and learns Aerial Ace.
This episode marks the first time a Water-type starter Pokémon in Ash's team evolves. This is also the first time since Pokémon League Opens! Water Battlefield! (1998), 776 episodes ago, when a Water-type Pokémon has evolved under Ash's ownership.
Frogadier remains outside of its Poké Ball for the entire episode.
Sanpei's Frogadier is revealed to have evolved into a Greninja.
Ash and his friends meet up with Sanpei again.