On the ferry ride to Twinleaf Town, our heroes discuss their plans for the future. Realizing that they will soon be going their separate ways, Dawn invites them over to her house first, and everyone happily agrees. Also on the way, the group meets a Pokémon Nursery teacher trainee named Normajean, who is taking care of a group of young, cute Pokémon.
Meanwhile, Team Rocket is hot on the trail of our heroes, following the ferry in their submarine. But they get off course when James spies his kind of treasure—a rare bottle cap—amidst a group of Tentacruel. They snag the bottle cap, and the very unhappy Tentacruel chase them right out of the water and onto the ferry, where they collide with our heroes! Ash and Pikachu try to drive the angry Tentacruel off, but Normajean’s young Pokémon are poisoned in the attack.
Springing into action, Brock attempts to heal the sick and injured Pokémon. The ferry’s passengers help him find some medicine, but not enough to cure everyone. Brock gets advice via video monitor from Nurse Joy, who is on her way by boat. She advises Brock to be persistent and do whatever he can to alleviate the suffering of the young Pokémon. Sure enough, Brock’s creativity and talent carry him through, and by the time Nurse Joy arrives, the Pokémon are as healthy as ever…and Brock’s Happiny, after helping him care for his patients, has evolved into Chansey!
Nurse Joy suggests to Brock that he’d be a great Pokémon Doctor, and he starts to think about a career path he’d never considered before. As the ferry approaches the Twinleaf Town seaport, Dawn spies her mother waiting there for her. We leave the group knowing that Ash, Dawn, and Brock will soon part ways, heading off to brand-new adventures!