Brian the Consultant is a criminal consultant who appears in the episode The Consultant and later in Vitamin Sucker. In The Consultant, he helps Dr. Kamikazi be a better villain and catch Robotboy, and as a result Kamikazi fires Constantine. Brian tended to praise Kamikazi, until he betrayed him. As a result, Brian came to Kaziland with the dragon clones to revenge Kamikazi and tell him all his praise was a lie, but then, Constantine shows up to help his boss but fails, and then Robotboy Superactivates, rescues Constantine and defeats the dragons. In Vitamin Sucker, he helps Klaus Von Affenkugel by creating the Vitamonger, that can suck all vitamins and shoot them at Affenkugel to make him stronger. Because of that, Affenkugel fires Ludwig and goes to revenge those who bullied him. But whe