On their way to Fuchsia City, Ash and the others notice a big explosion up ahead. They head to the site where a giant dam is being built. The explosion was caused by a bunch of Diglett, who are trying to prevent the construction. The project manager is more then willing to give a reward to any trainer who can get rid of the Diglett. Gary even shows up and he, along with Ash and many other trainers try to send out their pokemon. When they try to release their pokemon, none of them will come out, so all the trainers leave. Later that night Ash, Misty, and Brock find the home of the Diglett and Dugtrio, and find out that if the dam is built, there home will be washed away, so they decide to help prevent the construction. Meanwhile, Team Rocket are depressed over their losses, and complain that they need stronger pokemon, and Ekans and Koffing just might "grant" their wish.