Duelbot
Riding Roid (ライディングロイド, Raidingu Roido) is a type of robot used by Sector Security in order to assist them with crimes involving Duel Runners. It is later used by the Infinity Trio as part of their secretive plans.
Trudge named this type of robot a Riding Roid and revealed that these special robots are being used by Sector Security. In actuality, they are being mass produced by Placido, as a part of his manipualtive plans(it is implied that they are meant to power up some sort of Circuit the Infinity Trio has).
The first Riding Roid seen is Ghost, which was used to terrorize and defeat Turbo duelists, causing them to crash with major injuries. Its identity was revealed after Yusei Fudo defeated it in a Turbo Duel. After the defeat, Ghost rode out of the dueling lane and crashed into some trees. After Yusei, Jack Atlas, and Crow arrived, Crow touched the robot´s metal arm, which fell off.
This robot not only has been disguised to look like a human being, but it also posseses the characteristics and qualities of a Turbo Duelist.
Before it blew up, there was a factory that was mass producing Riding Roids similar to Ghost, it seems that they all were able to escape and wreck havoc, as part of Placido's plans.
One of these robots was even disguised and impersonating Jack Atlas himself, causing the same chaos on the Duel highway as Ghost had previously. This imposter was able to defeat the original at first, but later then lost during their rematch. At the end of that duel, the overwhelming attack of Jack's "Majestic Red Dragon" destroyed the robot.
After the duel between Team 5D's against Team Catastrophe, Placido releases an army of Riding Roids whom he calls call "Diablo". This robots then face off against Turbo Duelists through Battle Royal duels. All of this robots use Allies of Justice monsters during their duels.
