The Black Turtle is a boss character in Shinobi. An enormous attack chopper, it brings down minions of Zeed to attack Joe Musashi and keep him away, making him a challenging boss.
An elite member of Zeed's Ring of Five, the Black Turtle is a mysterious individual. Many rumors speculated that he was an ex military soldier and others say an international arms smuggler. What is known, is that his connections to various terror groups proved to be advantageous, and so Zeed would recruit him into their Ring of Five as for these connections.
Joe Musashi would track him down to a harbor port, where the master ninja took down the terrorists it dropped to impede him before finally meeting his end at Musashi's blade.