This season saw the return of former runners-up Team RioBotz and Minotaur, as well as fan favorites Icewave and Yeti returning to the main competition for the first time since World Championship III and IV respectively.

The roster included several established teams entering multiple robots, including but not limited to Seems Reasonable Robotics with Tantrum and Blip, and Team Fast Electric Robots with Whiplash and Defender.

World Championship VI had 60 competing robots in total. The BattleBots slot machine, developed by KONAMI. This slot machine was present during filming for the return of a live audience, as they were absent during the 2020 season due to the COVID-19 pandemic. To commemorate the new location, KONAMI developed a unique slot machine featuring a handful of iconic BattleBots competitors in their 2021 guise. The season was filmed at Caesars Entertainment Studios in Las Vegas, Nevada across a two-week period spanning late August to early September 2021. Like every other reboot era season, it exclusively featured heavyweight robots. Re:MARS all:STARS BattleBots Challenge (2022) World Championship VI, also known as Discovery Season 6 and the 2021 season, was the sixth season of BattleBots since its return to television in 2015, and the fourth season since the Discovery network picked the show up from ABC.

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