Dr. Vellian Crowler is a character in Yu-Gi-Oh! Duel Links. This is a video game depiction of Vellian Crowler, a character from the Yu-Gi-Oh! GX anime. He is exclusive to the special event Dr. Crowler's Tricky Tests, only being able to be dueled or unlocked during the event. He is unlocked by obtaining 300,000 points during the special event, then Dueling him in Duel World (GX). During the special event, Academy Notebooks are required to Duel him at the Gate.