Tinker Bell and the Lost Treasure (2009)

Tinker Bell's greatest adventure yet, takes place in Autumn, as the fairies are on the mainland changing the colours of the leaves, tending to pumpkin patches, and helping geese fly south for the winter. The rare Blue Moon will rise, and when its light passes through the magical Fall Scepter that Tinker Bell has been summoned to create, Pixie Hollow's supply of pixie dust will be restored. But when Tinker Bell accidentally puts all of Pixie Hollow in jeopardy, she must venture out across the sea on a secret quest to set things right.

Official website: http://www.disneyfairies.com