Bucking the Treasure Trend!
Ash and friends board a ship which will take them to the location of the Sinnoh League. On the boat they meet a trainer named Buck. They decide to help him find a treasure which is said to be located on a nearby island.
Aired 17/06/2010EP 181 - Bucking the Treasure Trend!
2006
Pokémon the Series: Diamond and Pearl
After defeating Brandon and declining the offer to be a Frontier Brain, Ash sets off to travel through the far away land of Sinnoh. Once he gets there, he meets up with Hikari, a local trainer from the region, and they decide to travel together.