Ep 25. Frozen on the Tracks!

Ash, Dawn, and Brock are on a train, headed for Ash?s big battle at Lake Acuity. They startle another passenger, Looker, a nervous but kind-hearted man who tells them about the Electric-type Pokémon working on the train. Naturally, our heroes are curious to see this for themselves, so they join Looker to visit the engineer and the train?s Ampharos. When the train is halted by an unexplained red signal up ahead, the conductor investigates and Looker gets off to take a walk. Looker actually suspects someone set the red signal to delay the train while they secretly used the railroad track, but who?