Dig Those Diglett!

S1, E31: Ash, Brock, Misty, and Pikachu are lost deep in the mountains. As they press on through a rough track that doesn’t show up on their map, they suddenly hear a large explosion! Running toward the sound in surprise, the party emerges on a construction site where tractors are building a tremendous dam. Ash learns that the foreman is trying to recruit skilled Pokémon Trainers because the burrowing Ground-type Pokémon Diglett are interfering with construction and delaying the completion of his work. He will award free travel passes to a luxurious natural hot spring to anyone who can help move the Mole Pokémon. As Ash scopes out the recruits, he notices a familiar rival in the mix: Gary!