Metal Gear REX
Metal Gear REX is a Metal Gear model that made it's appearance in Metal Gear Solid for the PlayStation and it's remake, Metal Gear Solid: The Twin Snakes for the GameCube. Metal Gear REX was designed by Hal "Otacon" Emmerich and uses a rail gun. The weapon is used by Liquid Snake, Solid Snake's genetic brother.
In Super Smash Bros. Brawl
Metal Gear REX appears in the background of the Shadow Moses Island stage in Brawl, bursting through the wall of the tank hangar and leering menacingly at the combatants on stage.
Trophy Description
"A war machine of ruinous power. Metal Gear REX was developed at the weapons company ArmsTech under the eye of Hal "Otacon" Emmerich. It had the ability to launch nuclear warheads from a mounted rail gun. During testing, REX was captured by FOXHOUND, a rogue special-forces unit headed by Liquid Snake, but Solid Snake managed to destroy the machine before calamity ensued."