Roark, the Oreburgh Gym Leader, and son of Byron, the Canalave Gym Leader, is visiting his father. The two of them, both users of Fossil Pokémon, are having an argument about who likes them more; and they end up battling. Meanwhile, Ash has returned to the Canalave Gym for a Gym Battle after hearing that Byron is back.

Ash and friends are having lunch when all of a sudden a Luxio comes along and steals all of their food. They follow it into the sewers where they discover a Wailmer that is trapped in the sewer and can't make it back to the ocean.