|Voiced by||Melissa Rivers|
Princess Irmoplotz is the evil sorceress princess of Hyrogoth.
She is either trying to destroy Dave, or at the very least make his life difficult. Her mother Zonthara is the ruler of Hyrogoth, and keeps trying to impress upon her daughter to be more evil since her husband, Irmoplotz' father, is good, Zonthara feels her to only be half evil.
At an early point in her career, the Princess fell in love with Dave, but was eventually dumped as he decided they were too different. So like all rejected girlfriends, she spends a large part of her time and efforts seeking revenge. However she may still have feelings for him as she once had the opportunity to destroy Dave, but chose not to.
She is similar to Dave in that they both have the same odd hobbies and interests, such as "bad poetry". She also shares the same allergies as Dave. She would be a great match for Dave only if she were not an evil princess.