The Big O Wiki

Big Duo Inferno

Seen in “Twisted Memories” and “The Big Fight”.


After its defeat at the hands of Big O and Roger Smith, Alex Rosewater gathered up the wreckage Big Duo along with several other mechas Big O had defeated in the past, like the Archetype and the Foreign Megadeus. Big Duo was reconstructed, and then further enhanced and improved upon. Alex then gave Big Duo Inferno to Alan Gabriel to act as both an enemy to Roger Smith and to distract Roger and Big O long enough so he could remove Dorothy's core memory and transfer it to Big Fau. During the fight, Roger was haunted by the memories of Schwarzwald and their previous fights, until he was confronted by Alan Gabriel at the controls, his body directly wired into Big Duo Inferno's controls as a substitute Dominus. The fight was violent and almost ended with Alan's victory, until Big Duo Inferno refused to listen to Alan's commands. Alan was then haunted by Schwarzwald's voice mocking him for trying to control a Megadeus. Supposedly under the control of Schwarzwald's ghost, Big Duo Inferno took off into the air and flew straight up, out of sight, but not before the psychotic Alan Gabriel was killed with a vast array of wires and cables pouring from the control panels. Big Duo Inferno is finally seen flying up into the ceiling of the stage above the City during the last 3 episodes. True to his word, Schwarzwald had exposed one of the greatest secrets the City had to offer, with the help of Big Duo Inferno. Big Duo Inferno finally explodes when it collides with what appears to be a gigantic stage light, miles above Paradigm City.


Much of its head had been replaced by the Archetype's and the entire Megadeus had been painted dark pink with flame decals on the arms. The overall design is spikier and sharper than the original, and with slightly altered weaponry. These changes consist of:

  • The head is retractable into the neck, equiped with a closing face shields, and featuring an oversized left eye taking up a significant portion of it's face.
  • The optic lasers were converted from dual beams into a single emitter in the larger left eye.
  • The manga exclusive missiles on Big Duo's head seem to be absent in his manga counterpart
  • The upper half of Big Duo Inferno's body can fold backwards, pointing the head and cockpit forward during flight, providing an aerial view similar to that of a conventional aircraft.
  • Presumably to accommodate for the tilting abdomen, the missile pods in Big Duo's chest were removed, leaving clean holes in it's place.
  • The shoulder, chest and rib areas have been made sharper and wing-like, with 2 long tailfins protruding out of Big Duo Inferno's back.
  • Claw-like propeller hands which can detach and reveal a set of silver propeller claw hands, which can act as drills.
  • The legs are shown now bend above and below the knees, enabling the ability to abruptly drop from the sky and land on foot safely rather than slowly hover down to the ground like the original Big Duo.
  • According to an extra concept art, Big Duo's landing gear was relocated, emerging from his forearms, lower chest, and shins. Combined with the double jointed knees, it's possible the reason we don't see Big Duo using leg missiles under Alan is due to that feature being gutted for new modifications to Inferno.


  • In both of its fights, Big Duo has the head destroyed, yet still continues to function under its own command without listening to the pilot.
  • It is possible that the rebuilt head of Big Duo Inferno is a mixture of Big Duo's original head and the head of the Archetype, both controlled by Schwarzwald at some point only strengthening the connection between the ghost of Schwarzwald and Big Duo Inferno.
  • Big Duo Inferno is the first Megadeus to label its pilot, Alan Gabriel in this case, as "Ye Guilty".
  • The flight capability is the combination of the tiltjet, tiltrotor, and tiltwing.

See Also[]

External Links[]