BP-601 GunMax, also known as the Motorcycle Detective, as part of the Brave Police, he can combine with his motorcycle, the Gun Bike to form GunMax Armor, or transform with his GunBike to form the Max Cannon as a weapon for J-Decker or Fire J-Decker.
Unlike the other Brave Police units, GunMax does not have a vehicle form, instead riding a large motorcycle called the Gun Bike. He originally came off as being overconfident, cynical and sarcastic, preferring to operate alone and shuns others. After his adventures with Yuuta and BP-110 Deckerd though, he began to open his heart and gradually became a team player.
Similar to the rest of the Brave Police, GunMax is armed with a standard-issue revolver and a mechanical Brave Police notebook. He also carries a shotgun for combat.
GunMax was originally built to work with the Highway Patrol division of the police, but ran into problems after his partner Kirisaki was revealed to be illegally selling police weapons and confiscated cars. He was transferred to the Brave Police shortly after, and had a rocky start due to his attitude and preference to not work with others, but eventually became a valued member.