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Robo Master was a lightweight robot built by Team Robo Master which competed in three seasons of Comedy Central BattleBots.

It was a silver robot armed with a lifting arm. Robo Master performed decently in competition, both winning and losing three fights.

Jim Yeh would later pair with Team X-Bots as they entered Agent X into the 2009 Pro Championship, before joining Team Special Delivery and Free Shipping in 2018.

Outside BattleBots[]

Robo Master competed outside of BattleBots either under the same name or AR.[1] The team would later create Ragin Scotsman for numerous RoboGames events.

Robot History[]

Season 3.0[]

Robo Master's first opponent was Matts Bammer. Matts Bammer won on a 41-4 judges' decision and Robo Master was eliminated.

Season 4.0[]

Robo Master first fought Daisy. The robots traded ramming shots, and then began a circling pushing match. Neither robot was handling very well, but Robo Master had the advantage in thrust and, and also got under Daisy with its wedge-lifting device. Robo slammed Daisy into the spikes, then backed up and shoved it into them again. Robo Master lifted Daisy up, and pushed it around some more. At some point, Daisy's weapon died. The judges came up a 23-22 decision in favor of Robo Master.

Robo Master's second fight was against UGV Scorpion for a spot in the TV rounds. UGV Scorpion slammed Robo Master very hard in to the wall. UGV Scorpion then chased Robo Master around but lacked control. Robo Master managed to get in one lift , but it couldn't do much with it. UGV Scorpion gained control and rammed Robo Master a few more times. Robo Master slowed down, then as Scorpion turned in place, Robo Master suddenly darted out and caught UGV Scorpion, lifted it up, and pushed it. The match ended up going to the judges, who scored 26-19 in favor of UGV Scorpion.

Season 5.0[]

Robo Master's first fight was against Little Hater. Robo Master was able to win on a close 25-20 judges' decision.

Its second fight was against O'Dominator. Robo Master was able to score another judges' decision victory, 31-14.

Robo Master then fought Sublime where it lost on a 15-30 decision, eliminating it from the tournament.


  • Wins: 3
  • Losses: 3
Competition Wins Losses
Season 3.0 None Matts Bammer
Season 4.0 Daisy UGV Scorpion
Season 5.0 Little Hater