Dr. Slump and Arale-chan Movie 10: Arale's Surprise

Dr. Slump Movie 10: Arale no Bikkuriman

Arale and company arrive at a nice location for a picnic. They soon discover a beautiful stone with strange powers. Before they know it, a dangerous pirate and his mysterious ship invades their peace and steals the stone. Now it is up to them to retrieve the stone before it is used by evil hands.