Abstract: A motorized mobile robot carries a person and is articulated and controlled by joysticks and foot pedals or by remote control to simulate the sport of boxing by effecting punches and blocks upon a like robot. Fluid motor driven wheels propel the robot in forward, rearward, lateral, turning, and spinning movements. An upper frame above the wheel base defines an enclosure having a generally humanoid configuration including a torso with an interior seat for supporting a person within the enclosure in a sitting position. A pair of independently movable arm assemblies connected at each side of the torso are driven by fluid actuators and each has a shoulder portion pivotally movable relative to the torso, an upper arm portion pivotally movable relative to the shoulder portion, and a forearm portion pivotally movable relative to the upper arm portion with a padded boxing glove at the outer end.