In the Fire Emblem franchise, the Black Knight is the alter ego of Zelgius, a powerful, heavily armored general who serves as a major antagonist in Path of Radiance. In the Sonic the Hedgehog franchise, the Black Knight is a corrupted, spectral version of King Arthur who serves as the primary antagonist of Sonic and the Black Knight.
In the
Fire Emblem universe, this imposing figure is defined by his jet-black, goddess-blessed armor, which renders him impervious to conventional weaponry, and his signature blade, Alondite. His narrative arc centers on a fierce rivalry with the mercenary Ike, initiated when he defeats Ike's father, Greil, in single combat. This confrontation establishes him as a looming threat throughout
Fire Emblem: Path of Radiance, requiring players to acquire specific divine weapons to damage him in late-game encounters.
For his appearance in
Sonic and the Black Knight, the character's corruption stems from the magical scabbard of Excalibur, which grants immortality at the cost of his soul. This version wields a massive broadsword and commands an army of underworld monsters known as Phantasms. Players confront him in high-speed sword-fighting duels that utilize the Wii Remote's motion controls. His defeat reveals the deeper machinations of the sorceress Merlina, shifting the narrative focus toward the true nature of the Arthurian world.