Cilan (anime)/HIstory/BW/Decolore Islands

In Farewell, Unova! Setting Sail for New Adventures! Cilan, Ash, and Iris traveled to the Decolore Islands as a means to travel to Ash's home in Pallet Town. The gang was tricked into giving their Poké Balls to Team Rocket, however. Eventually, they got them back by the end of the episode due to Oshawott freeing them.

In Cilan and the Case of the Purrloin Witness!, Cilan tried to investigate the person who stole the gem of the gem collector Mrs. Ripple. He eventually deduced the thief's identity as Teaque, a competitor of Ash in the Marine Cup Tournament.

Cilan and the group met up with Alexa, a journalist from the Kalos region visiting the Decolore Islands to research local festivities on the islands, in The Journalist from Another Region!, while in Harvest Island. On the island, the group entered a Pokémon Sumo competition, which Cilan entered Pansage in. Pansage won in the beginning round, but was eventually defeated. After this, Alexa and the group decided to travel together throughout the rest of their adventures in the Decolore Islands.

When the group arrived in Kanto in Best Wishes Until We Meet Again!, Cilan and Iris decided that they will stop traveling with Ash. Cilan decided to travel to Johto to compete in the Old Rod Fishing Rally that was being hosted by Mr. Briney from the Hoenn region. He also decided to start anew as a Connoisseur. As such, he chose to travel with Iris on the magnet train and then set forth to the competition once in Johto.