A fictional manned giant robot from theGundammechaverse. It first appeared inCrossbone Gundam. XM-X1 (F97) Crossbone Gundam X-1 A custom, pirate stylised mobile suit developed for theCrossbone Vanguardto be used in the Jupiter Sphere. To account for the extreme gravitational pull of Jupiter, it was given a revolutionary X-shaped thruster arrangement that kept the power high and the weight low, granting it fantastic mobility inJupiter's orbit - and had the additional effect of causing the unit to be borderline out of control in the weaker gravity ofEarth. It was primarily piloted byKincade Nau.