On the way to Nacrene City, Axew wanders off to get some apples and ends up trapped in the horms of the bug pokémon Scolipede. The Pokémon begins rampaging and now everyone must find a way to stop it and get Axew back.

On the way to Nacrene City, Ash and friends encounter the Pokémon Dwebble. However, this Dwebble does not have a rock on its back as it should. It begins to make a new shell, but then three more Dwebble show up and trouble starts.