Unrelated to the heavyweight from the 2015 ABC Reboot, Bull DogBulldog was a lightweight robot which fought in the final three seasons of BattleBots. It was a Lexan box-shaped robot originally armed with a wedge, then replaced with a swinging spiked hoop for Season 4.0 before being replaced with a wedge and three spikes for Season 5.0. It performed decently in competition, winning fights in all three seasons of competition and reaching the round of 32 in Season 4.0.
The team that built Bulldog still competes in RoboGames each year in the lightweight class.
Bulldog's first ever fight in BattleBots was against Purple Haze. Bulldog won the match by KO and advanced to the final preliminary round, where it faced Whirl Wep X25. Whirl Wep X25 won the match by KO and Bulldog was eliminated from the tournament.
Bulldog was due to fight DiamondBack in its first battle of the season, but DiamondBack had technical issues and was forced to forfeit. Bulldog won the match by default and advanced to the final preliminary round, where it faced Ack-Ack!.
From the start of the match, Bulldog shoved Ack-Ack! around the BattleBox and rammed it against the spikestrip multiple times. Eventually, Ack-Ack! stopped moving and it was counted out. Bulldog won the match by KO and advanced to the TV rounds, where it faced Das Bot. Das Bot won the match by KO and Bulldog was eliminated from the tournament again.
Bulldog wasn't finished, however, as it participated the lightweight consolation rumble at the end of the tournament. In the end, The Crusher and Dr. Inferno Jr. won overall and Bulldog lost as a result.
Season 5.0Bulldog's first fight in Season 5.0 was against SnowCone. Bulldog won the match by KO and advanced to the next preliminary round, where it faced Firestorm. Bulldog won the match by KO and advanced to the next preliminary round, where it faced The Prosecutor. The Prosecutor won the match on a 29-16 judge's decision and Bulldog was eliminated from the tournament once again.
- Wins: 5
- Losses: 3
|Season 3.0||Purple Haze||Whirl Wep X25|
|Season 5.0||The Prosecutor|