Metal Sonic, designated Hyper Metal Sonic in this continuity, is a biomechanical replica of Sonic the Hedgehog engineered by Dr. Eggman as a weaponized upgrade to his rival. Forged using uploaded combat data extracted from Sonic’s physical and tactical patterns, the machine achieves an exact replication of his speed, agility, and fighting style, positioning itself as a formidable doppelgänger.

Eggman unleashed Metal Sonic with dual directives: annihilating the hedgehog and securing global supremacy. In combat, the robot deployed a lethal arsenal—supersonic charges, devastating energy projectiles, and tactical algorithms that adapted mid-battle. Its design fused Sonic’s silhouette with overt mechanization: cobalt armor plating, crimson optical sensors, and a turbine core integrated into its chassis, echoing Sonic’s aesthetic while underscoring its artificial lethality.

During their final clash, Metal Sonic’s protocols triggered an emergency power drain from Eggman’s machinery, overclocking its systems to destructive levels. Sonic countered by targeting a critical weakness in its overloaded energy matrix, destabilizing the machine. Defeated and deactivated, Metal Sonic was catapulted into a volcanic abyss, its remains immobilized amid molten rock. No subsequent reactivations or narrative continuations are recorded for this iteration.