HGBuild Fighters

MRXGM-009 Psycho GM

A GM-headed mobile fortress that laughs at what an HG box is supposed to hold.

MechaGrade Score

4.2/5

Psycho GM · 1/144 · 2017

GradeHG

Scale1/144

Released2017

Runnersn/a

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The verdict

This is one of the best surprises I have ever pulled off a P-Bandai shelf, an HG-scale kit with an MG-sized box and a finished model that clears a foot tall.

I went in expecting a reskin joke, the Gunpla Mafia boss slapping a GM head on a Psycho Gundam, and came out with a kit that transforms into a mobile fortress with real collapsing supports and sliding panels. It reuses the excellent HGUC Psycho Gundam engineering almost wholesale, and that engineering earns every bit of its reputation.

Best for: Build Fighters fans and Zeta-era completionists who want a genuine transformation gimmick and a centerpiece-sized model without stepping up to MG or PG

The full review

What it is

The Psycho GM is the HGUC Psycho Gundam wearing Gunpla Mafia colors, red and white in place of the original's scheme, with a GM-style head swapped on to sell the joke that a mid-tier suit got dragged into heavyweight territory. What you actually get is a roughly 218-part kit that builds into a display piece pushing close to twelve inches, easily rivaling a 1/60 scale model despite the 1/144 label. The transformation into Mobile Fortress mode is the real headline. Panels slide, support struts fold out, and the whole silhouette changes rather than just tucking a few limbs in. Building it felt less like assembling an HG and more like unwrapping a small event kit that happens to carry an HG price tag on the standard release.

The catch

This was a Premium Bandai exclusive, so getting one new means paying P-Bandai markup (it launched around 6,264 yen, with later reissues landing near 60 USD) and hunting secondary market listings once a run sells out. The rear skirt armor is fixed to the back half of the body rather than posable, which caps how far you can kick the legs backward. The snap-fit joints on the transformation mechanism are genuinely tight, builders who forced pieces together too hard reported real trouble getting them apart again to attempt the fortress conversion cleanly, so this is not a kit to rush through on a first try.

Who it's for

Grab this if you already like the Zeta-era Psycho Gundam design or the Build Fighters GM's Counterattack side story, and you want a transformation gimmick that actually earns the word. It also makes sense for anyone who wants MG-scale shelf presence without committing to MG-scale time or money. Skip it if you only buy kits through mainstream retail and don't want to chase a P-Bandai reissue, or if fiddly, unforgiving snap-fit tolerances during a big transformation sequence sound like a headache rather than a challenge. This is a patient builder's kit, not a weekend speed build.

The build story

What the build is actually like, and the engineering worth knowing about.

The build inherits the HGUC Psycho Gundam's part count and structure almost directly, around 218 pieces plus polycaps, so expect an HG-scale gate and nub layout stretched across an unusually large runner set. Cleanup is standard HG-level work, nothing miniaturized or fussy the way RG parts can get, but there is simply more of it than a typical HG demands. Color separation leans on the molded red and white plastic rather than heavy stickers, which keeps the finished look clean straight off the runners.

The standout engineering is the transformation sequence itself, panels on the torso and limbs slide and rotate to reveal the Mobile Fortress configuration, supported by fold-out struts that hold the new silhouette without extra parts swapping. Articulation for a kit this size is genuinely strong, ball-and-socket neck and thighs, workable elbow and knee bend, and fully poseable fingers on the manipulators, though the fixed rear skirt keeps hip extension modest. For the price point, getting both a full-size mobile armor display and a working transformation gimmick in the same box is unusually good value.

Lore & trivia

01The Psycho GM is built and piloted by Mikio Mashita, the boss of the Gunpla Mafia, in Gundam Build Fighters: GM's Counterattack, where he uses it to battle Sei Iori.
02Despite its GM-style head, the Psycho GM is classified as a Mobile Armor rather than a Mobile Suit, matching the classification of the original MRX-009 Psycho Gundam it's built from.
03In its Mobile Fortress mode the Psycho GM can fire six reflector bits from its mouth, weapons that can redirect its own beams around obstacles or fire independently, the same psycommu bit technology used on the MRX-010 Psycho Gundam Mk-II.
04The kit was a Premium Bandai exclusive first released in December 2017, with later reissues bringing it back to market at roughly 60 USD.