Card Trivia:Machine King
- This monster appears in the artwork of "Faulty Fire".
- "Machine King - 3000 B.C." > "Machine King Prototype" > "Machine King" > "Perfect Machine King"
- This is the only "Machine King" monster that counts for its own ATK-increasing effect.
- Both this monster and "Dark Ruler Ha Des" are considered rulers of their respective realms, and have at least three notable servants mentioned in flavor text or depicted in card artworks: "Dark Resonator", "Opticlops", "Winged Minion", and "Berserk Dragon" for "Ha Des"; and "Mechanicalchaser", "Robotic Knight", and "Cyber Soldier" for this monster.
- The Duelist League 4 variant of this card has its name printed in white text.