Roidmude 020 was sent alongside Roidmude 014 and Roidmude 061 to accompany Mashin Chaser in a mission to take out Ultimate Lupin, who had gained the use of the Heavy Acceleration power possessed by the Roidmudes. 020 and the other two Low-Class Roidmudes attempted to attack Lupin, but were caught in the Lupin Gunner and had their data shattered and absorbed by the phantom thief.
Later on, 020 and the others had their data recreated as blank Lost Number Roidmudes during Lupin's second match with Drive. 020 used its webbing to tie Kiriko up and hold her captive while 014 and 061 attacked Drive. However, Chaser suddenly showed up and held off the two Lost Numbers while Drive rescued Kiriko and destroyed 020.