On their way to the Sinnoh League, Ash & Co. meet up with Flint’s brother, Buck, a treasure hunter eager to find treasure on a nearby island. Buck requests the assistance of Ash & Co. in finding this treasure. However, Team Rocket also overhear this information and decide to get the treasure for themselves. Buck and co. find a ruin and a Claydol is guarding it. Buck catches the Claydol and the treasure turns out to be vases and other stuff.