Ash's Swellow is revealed to know Double Team.
Given that Tate and Liza are the Gym Leaders of the same Gym, this marks the only time Ash has defeated two Gym Leaders at once in a single episode. For the same reason, this also marks the first time Ash has battled more than one Gym Leader in a single episode.
Ash defeats Tate and Liza in a Gym battle, earning the Mind Badge.
Pikachu uses an improvised technique, Thunder Armor, which doesn't exist in the games and therefore only serves as a deus ex machina.
This episode features a rare occasion where Wobbuffet does not make an appearance in the motto, although he did appear earlier in the episode.