Pokemon DP: Sinnoh League Victors Set 3

On their way to the Sinnoh League on Lily of the Valley Island, Ash and friends run into some familiar faces, prompting a series of friendly battles. Then they decide to take a detour when an aspiring archeologist invites them to join him on a treasure hunt. But the real prize awaits when the battles of the Sinnoh League begin! Does Ash have what it takes to make it to the finals?