Ash, Clemont, and Bonnie convince Serena to join them on their travels! She returns a handkerchief Ash lent her long ago at Pokémon Summer Camp, and he finally remembers her as the girl in the straw hat. He used his handkerchief to wrap up her knee after she hurt it in a fall at camp, and she’s kept it ever since!
They’re still reminiscing when they’re interrupted by a rumbling roar, and then see several Rhyhorn, with riders on their backs, pounding toward them! Apparently the track they’re walking along is really a Rhyhorn racecourse—and the race is in full swing! Officer Jenny takes them into Odyssey Village and shows them where the racing Rhyhorn live. She says that tomorrow, the race will be open to first-timers, and Ash is excited to enter!
He quickly realizes he doesn’t know the first thing about Rhyhorn racing—he even has trouble getting up onto Rhyhorn’s back. But Serena’s mom used to be a Rhyhorn racer, so Serena is pretty good at this stuff, and she shows him the ropes. She even shares her mom’s advice, “Be one with Rhyhorn,” which seems to help Ash get the hang of things!
The next day, it’s time for the race! Of course, the Team Rocket trio have been lurking about as usual, and they interrupt the race in an attempt to catch the racing Rhyhorn—and Pikachu, too! Ash and the other racers are tied up and unable to help, but Clemont, Serena, and Bonnie are soon on the scene! Clemont and Bonnie free the captured Rhyhorn while Serena and Fennekin hold Team Rocket at bay, and then the Rhyhorn close in to send the villains blasting off again.
Before leaving the village, Serena calls her mom to introduce her new friends and share her travel plans! Ash, Clemont, Bonnie, and Serena excitedly make preparations to head out for Cyllage City. But first, Serena has a gift for Ash! She baked some cookies to recognize his hard work, and to thank him for helping her all those years ago. There are enough cookies for everyone, so they won’t be traveling on an empty stomach as the journey continues!