He showed up uninvited at the World Racing Grand Prix Premier Event, crashing inside the building and holding up the event with the help of his Duel Runner. Dobocle appeared because he was angry about how Turbo Duels are going to be displayed during the World Racing Grand Prix (in the dub, he attempts extortion, threatening to disrupt the tournament unless he is paid a share of the prize money). Though Sector Security tried to arrest him, he easily disposed of them. While he was wreaking havoc and destruction, the Three Pure Nobles and Lazar were watching. However, Dobocle's rampage was ultimately put an end to by Akiza Izinski, who Summoned "Black Rose Dragon", which then used its tail to send Dobocle and his Duel Runner flying and out of the building. Despite Sector Security surrounding him, he still tried to escape, only to be pursued and violently defeated by Primo and "Meklord Emperor Wisel". His Duel Runner was completely destroyed in the onslaught.
He survived though, and later Dueled Crow Hogan after the latter became a member of Security.