After the events of the last episode, Ash finally has his battle with Burgh at the Castelia Gym. Meanwhile, though disbanded, Jessie, James and Meowth search for their boss Giovanni. James finds a Yamask and feeds it. After this act of kindness, Yamask is caught by James. During the Gym Battle, Ash's Sewaddle evolves into Swadloon and with it, Tepig and Pikachu, Ash wins the battle and the Insect Badge.
This is the first episode where a main character's Pokémon evolves during a Gym Battle.
This episode was supposed to air two weeks later but was bumped after the episode "Team Rocket vs. Team Plasma"'s delayment.
In the English Dub, Giovanni's secretary says he's busy with meetings and cannot be bothered to give Jessie, James and Meowth a mission; she says what they do from then as their mission is up to them. This is due to the previous two episodes not being aired.
Team Rocket returns to their old uniforms (forgoing the dark trench coats), but keep their gadgets & seriousness.
The music motto of Team Rocket in the Diamond & Pearl series is back and added to the Black & White series.