Metal Bear is a Metal Grappler Robo from the Custom Robo series. It is a Normal Style Metal Grappler in the N64 titles and an Armor Style Metal Grappler in Custom Robo: Battle Revolution. Its primary Commanders are Max in all 3 games and Ernest in Custom Robo: Battle Revolution, but some of the Criminals, Lab Techs, and Z Lackeys use it in Battle Revolution.
Two upgraded versions of Metal Bear appear in Custom Robo GX. They are known as Neo Metal Bear and Death Metal Bear.