Stitch!: Zutto Saikou no Tomodachi

スティッチ! ずっと最高のトモダチ

In their new adventure, Yuuna and Stitch move from their small island Izayoi to the Okinawa main island where Yuuna is supposed to visit a school. A new cast of friends awaits them there as well as a new crisis approaching from space. (Source: AniDB)