The Stag Jet (codename SJ-05) is Beet J. Stag's Gear Beast Battle Machine which, in Vehicle Mode, resembles a fighter jet. It can be piloted & can upgrade into a variety of forms each with its own function, chief of which is its Animal Mode. Its driver interface does not require a BioBuddy- just a pilot utilizing the Wheel Blade. However, the pilot of the Stag Jet, Beet J Stag, happens to be a BioBuddy. It is rested on top of Beetle Crane during transport.