Pokémon : S5 | E3 – Takin’ It on the Chinchou

Ash and his friends are riding a cable car to what they think is Bluefinland, where they want to take a ferry to Yellow Rock Isle. The overhead announcement reveals that the cable car is actually stopping at another town called Blue Lagoon. Brock states that if they miss the next ferry, they'll have to wait another three days for another one, but Ash assures his friends that he'll think of a solution. Suddenly, a Chinchou appears in front of them, and a curious Ash pulls out Dexter for extra information. Misty is instantly keen to add a new Water Pokémon to her team and tosses a Poké Ball at it, but the Poké Ball bounces off the Chinchou. A boy's voice is heard, yelling the name "Bright"; the boy gets to the Chinchou, but it hops away. Ash goes around and cuts the Chinchou off, but it ends up using Spark on Ash. The boy demand Chinchou apologize, but Ash admits that he shouldn't have grabbed one of its antennae. The boy introduces himself as Dayton and is thrilled to meet the group of Trainers. Ash informs him that they are hoping to reach Bluefinland, and Dayton replies that he is going there for the Parade of the Chinchou. Ash is pleasantly surprised and asks if Bright will be leading them there, only to receive a powerful Spark attack in return. Team Rocket, spies on the group, and Jessie is keen to steal the Chinchou for herself.

Ash gives Professor Oak a call from Blue Lagoon's Pokémon Center. He asks the Professor why the Chinchou, a sea dwelling Pokémon, is up in the mountains. Oak explains that the Whirl Islands were once part of the seafloor, but geological forces led them to rise out of the sea as the islands of today. He reveals that the Blue Lagoon is an ancient breeding ground for the Chinchou, and that every year the Chinchou make their way up the mountain to lay their Eggs and later return to the ocean. Dayton says that the Parade of the Chinchou is a festival that commemorates the Chinchou's return to the ocean and informs the group that he and his father will be leading this year's parade. Dayton later asks his father if Ash and his friends can join the parade. Daizō happily agrees to have the extra help.
(Source: Bulbapedia)