Still on the way to Nimbasa City, Ash and co. accidentally encounter Trip when he tries to capture a Palpitoad. The two then have a battle and Trip decides to use his Vanillite, Servine and Timburr. While Ash use Tepig, Oshawott and Snivy. Who will win this time? And why is Iris afraid of Trip's Vanillite?
Iris is revealed to have a fear of Ice-type Pokémon, the same way Misty has a fear of Bug-Type Pokémon.
Ash told Oshawott to use "Shell Blade", just like did it in BW031.
This is the first episode to feature voice actor Bill Rogers in the Black and White series.