Goh enters a Magikarp Jump tournament with his Magikarp, but feels he's unlikely to win as his Magikarp has got too fat. He decides to train his Magikarp so that he can win the tournament Ash & Goh have gone to Slowpoke Island, an island filled with... (more) Slowpoke. However, a Slowking soon arrives and its Shellder attaches itself to Ash...