GAT-X252 Forbidden Gundam

GAT-X252 Forbidden Gundam

The GAT-X252 Forbidden Gundam is a Mobile Suit introduced in the Mobile anime

Follows Gundam SEED. It is controlled by the “Biological CPU” Shani Andras.


A second-generation GAT-X machine, the Forbidden is designed to infiltrate and pillage enemy bases and to fulfill this role, it can transform into the "High-Speed ​​Assault Form" by flipping its massive backpack unit on its head. Like the other two second generation units, the Forbidden is equipped with Trans-Phase armor. Its armament consists of head-mounted CIWS, forearm-mounted machine guns, a hand scythe, and backpack-mounted machine guns and plasma cannon, both usable only in the "form" High-Speed ​​Assault Form.

As indicated by its model number, the Forbidden uses an X200 series frame like the GAT-X207 Blitz Gundam, and as such it also comes equipped with special equipment. This special equipment is a "Geschmeidig Panzer" energy deflection armor installed in its two massive shields. This equipment can deflect all ray-type attacks that hit it, making the Forbidden virtually invulnerable to these attacks. Coupled with the fact that the shields themselves also have TP armor, the Forbidden is therefore well protected from most physical and beam type attacks. Additionally, the "Panzer Geschmeidig" also allows the Forbidden to move easily underwater, even though it is not specifically designed for aquatic use.

Another special equipment is the magnetic field generators installed on the linear cannons, these allow the bending of the plasma cannon beam, making the attack more difficult to avoid. Thanks to the powerful thrusters in the backpack, which is actually a specialized flight unit, the Forbidden can fly in the atmosphere and is one of the few machines capable of air and water combat without additional equipment.

  • Geschmeidig Panzer

Mounted on the shields, this system uses colloid particles to repel and redirect energy beams away from the Mobile Suit. The particles used are different from those used in the Mirage Colloid stealth system, but the two systems are similar because strong magnetic fields are needed to hold the particles in place above the armor. This deflection system, however, seems ineffective against beam-type melee weapons, as the ZGMF-X09A Justice Gundam's beam boomerang is capable of damaging the surface of shields. This system is also used to move through water and counteract water pressure.

  • Magnetic Field Generator

To make the Forbidden's only beam weapon, the "Hresvelgr" plasma induction cannon, more effective in combat, both "Eckzahn" linear cannons are equipped with magnetic field generators. These devices generate a magnetic field between the guns that can change the direction of the Hresvelgr's plasma beam, making it difficult for enemies to dodge the attack, and allowing the beam to strike enemy units unsuspectingly or by surprise.

  • Trans-Phase armor

A new version of Phase Shift armor (PS armor), Trans-Phase armor is a two-layer armor system with the PS armor placed behind the normal armor. Internal PS armor only activates when normal armor is pierced, significantly reducing power consumption and allowing the equipped machine to have a longer uptime as well as reserve more power for his weapons. Additionally, MS equipped with Trans-Phase armor does not change color when their armor is activated, unlike the original PS armor.


  • "Igelstellun" 75mm Multi-barrel Anti-Air CWS: Two of these light projectile weapons are mounted in the head of the Forbidden and although designated as anti-aircraft, they can be used for missile interception and to destroy vehicles lightly armored.
  • "Armfeuer" 115mm Machine Gun: Mounted on each forearm, these are primarily used to discourage enemy units from closing in or to restrict their movements in close combat.
  • "Eckzahn" 88mm Railgun: A pair of linear cannons are mounted on the backpack, and they are only usable in the "High-Speed ​​Assault Form". This is the most powerful solid fire weapon in the Forbidden and can destroy most MS in a single shot.
  • "Hresvelgr" Plasma Induction Cannon: The Forbidden's unique beam weapon but also its most powerful weapon, it is mounted on the backpack and usable only in "High-Speed ​​Assault Form". The beam fired from the cannon can be deflected and directed via the magnetic field generated between the cannons.
  • "Nidhoggr" Heavy Scythe: The Forbidden's only hand-held weapon, it can be used to cut up and destroy small battleships/mobile units and even Mobile Suits. The sharp blade is made using a special process created by technicians who once lived in the Graveyard.


In mid-CE71, the Terran Alliance collaborated with Muruta Azrael's Azrael conglomerate to construct three second-generation Project G Mobile Suits. These MS use more advanced technology, based on the old G Project machines, and are controlled by "Biological CPUs". One of these machines was the GAT-X252 Forbidden Gundam, piloted by the "Biological CPU", Shani Andras. The Forbidden debuts during the Battle of Orb, alongside the GAT-X131 Calamity Gundam and the GAT-X370 Raider Gundam, and the trio takes on the ZGMF-X10A Freedom Gundam and the ZGMF-X09A Justice Gundam. After the battle, the trio was sent into space and assigned to the Archangel-class assault ship, the Dominion, under the supervision of Azrael, one of the leaders of the anti-Coordinator terrorist group, Blue Cosmos.

During the Second Battle of Jachin Due, the Forbidden was about to

destroy the MBF-02+AQM/E-X01 Red Wing Strike, but was interrupted by the GAT-X102 Duel Gundam. Using the Forbidden's Hresvelgr, Shani fired twice at the Duel and an explosion occurred. However, the Duel survived and rushed out of the explosion, the Forbidden's attack had only destroyed the Duel's Assault Shroud armor. The Forbidden was impaled by the Duel Gundam's beam saber, and Shani was killed when the MS exploded.

As the Forbidden's Geschmeidig Panzer system could also be used as an underwater propulsion system, OMNI used the machine as the basis for creating an underwater Mobile Suit, resulting in the GAT-X255 Forbidden Blue, which was also deployed during the war.

Did you know?

  • The Forbidden's head crest displays the text "SETTE X-252". "Sette" means "Seven" in Italian, and is likely a reference to the fact that the machine was the seventh GAT-X unit developed by the Earth Alliance.
  • The Forbidden is the only unit of the second generation of GAT-X machines to be armed with "Igelstellung" 75mm Anti Air CIWS, mounted in the head.
  • The head-shaped part on the Forbidden's backpack resembles those of the MS used by the Revolutionary Space Army in After War Gundam X, such as the RMS-006 Jenice or the RMS-019 Crouda.
Back to blog

Leave a comment

Please note, comments need to be approved before they are published.