All bonus characters: Access the operator's menu. Select "Configuration",
then "Game". On player one's side, press Up,
Down, Right, Left, 1, 2, 3,
4. A sound from Dio will confirm correct code entry. Select
the "Save And Exit" option. Shadow Dio, Kan, New Kakyoin,
Hol Horse with Voing, Robber Soul, and JoJo will now be unlocked.
