Alex Kidd has to rescue his girlfriend, a native of Shinobi World, from an evil ninja named Hanzo. A good ninja fuses into him and gives him his powers.
Alex Kidd in Shinobi World contains 4 rounds with 3 stages:
Round 1: Kabuto
Round 2: Raid of the Helicopters
Round 3: The Jungle
Round 4: The Battle with the Dark Ninja
