While Pikachu recovers, a wild becomes strangely attracted to him, following him everywhere because of the intense magnetic fields his "electric cold" is emitting. The Grimer Invasion
By the end of the episode, Pikachu is fully healed, and the Magnemite—having lost its magnetic attraction to Pikachu once he recovered—departs, leaving the city significantly cleaner and powered up again. Sparks Fly for Magnemite - Ash Gray Episode 30 30 : Sparks Fly for Magnemite
The group investigates the power plant and discovers it has been overrun by a swarm of and their leader, a massive Muk . These sludge Pokémon have clogged the seawater intake, causing the blackout. The Climax While Pikachu recovers, a wild becomes strangely attracted