Jaclyn

Jaclyn (or Heidi) is the tertiary antagonist of Igor. She is Dr. Schaudenfraude's vain girlfriend who has the power to change herself into any of the mad scientists' girlfriends in order to seduce them into giving her and her boyfriend the secrets of their machines by eating some magic vitamins. She also assists in helping Schaudenfraude's attempt to win the science fair. She is a beautiful woman with white hair, a purple hat, green eye shadow, a short black dress with purple/pink sleeves, a short skirt, purple leggings and a veil on teh bottom and boots. As Heidi, Dr. Glickenstien's girlfriend, she has red hair in pigtails, a Swedish accent and a Swedish dress that's purple and green. When she ran out of the pills, she is transformed into her true form a female Igor with Heidi's pigtails. She is voiced by Jennifer Coolidge.

Bio
She first appears as a stage girl like thing to her boyfriend's show, then hearing Shaudenfraude complain about his lack of winning every year. She gets into a brief argument(which involves them slapping Shaudenfraude's Igor) before they make up and Jaclyn slips into one of her pills to change into Dr. Glickenstein's girlfriend Heidi, whom his Igor(and our main protagonist of the movie) has a crush on, unaware that she's just faking it. She later appears when she and Shaudenfraude finds out that Igor had created the monster which is supposed to resemble life which she calls herself Eva. They chase the trio down the road, but fail. Jaclyn under Shaudenfraude's commands turns into Heidi again, this time to give him the card that teleports him to Shaudenfraude's place. She gets frightened by Eva, but she then lies to Eva because she knows of Igor's feelings for her. She goes back and Shaudenfraude kisses her before she eats a pill, turning her back into Jaclyn. Jaclyn gets so frustrated that she has to seduce every other mad scientists' girlfriend year after year to help him win and she tells him about Eva's desire to be an actress. She then turns into Heidi to seduce Igor to break Eva's heart to turn her evil and join Shaudenfraude. Igor rejects 'Heidi' for Eva before revealing herself to Igor. She joins in with Shaudenfraude takes over the throne briefly. After Malaria is free from the evil storm clouds again, she last seen about to get her pills but she finds out that she's run out she transforms into an female Igor.

Trivia

 * She has yet to return in a mystery, maybe with Shaudenfraude.
 * Jaclyn and her alter-ego Heidi is a pun off the character Jekyll and Hyde.