Watch Dr. Slump and Arale-chan: Hello! Wonder Island (1981) : Full Movie Online Free Professor Senbei finds a videotape of his deceased father providing instructions on how to create a love potion. The main ingredient is a tear of the evil Gyaasuka Daimao who lives at the Wonder Island. To retrieve it, Senbei takes Arale and Gatchan on a wacky adventure.