Saru Getchu Movie: Ougon no Pipo Helmet - Ukki Battle(2002)

One day, a strange monkey with a golden helmet drains out the insides of another monkey by kissing him. Hikaru, Spike's brother, goes out on an adventure to find this strange monkey. He soon befriends the monkeys and runs forward. But it isn't easy when every boss from the former games tries to block his path...