- "Either the duck suffers or the kid does, or none of you is getting nothing from Shauna. (Points on herself and looks at Bart.) I'm Shauna."
Shauna is the ex-girlfriend of both Bart and Jimbo.
She seems to be a bully, since Jimbo, Dolph and Kearney had to impress her throwing a duck's baby into the air, and according to Shauna, either the ducks suffer or Bart does. It is known she later made out with Jimbo, as she is watched kissing Jimbo by Ned. However, it seems that they weren't in a relationship as Jimbo was invited by Shauna over SpringFace to make out with her, along with 200 guys and 7 girls, implying Shauna may be bisexual.
When Jimbo, Dolph and Kearney went to watch Crawlspace, Shauna said that she didn't want to go and Jimbo made Bart take her to see All the Wrong Reasons instead. Shauna waited until she saw the lead male character's butt then left with Bart. They went to The Brown Burrito where Squeaky-voiced teen flirted with her until Bart stopped him. Jimbo thought that Bart had taken such good care of her that he would do so again the next day.
In Crème de la Creams, Shauna was caught shoplifting by the Springfield Mall security guard but Bart took the fall for her. Shauna was touched by this gesture and after helping him escape, showed him her breasts. Shauna and Bart later entered a relationship with Shauna two-timing on Jimbo. Eventually, Jimbo caught Bart and beat him up. However, he and Shauna still met up as Bart was trying to get home without being caught by the bullies.
Bart took Shauna to The Android's Dungeon & Baseball Card Shop to escape and Comic Book Guy called the bullies, as a fellow bully himself (though a cyber bully). Shauna then got into a flame war with him and won before they ran off again and hid in Bart's treehouse. Lisa came up and persuaded Shauna to dump both Jimbo and Bart as she was better off alone.
Shauna later got jobs at Krusty Burger, where she often burned herself to go home, and became the manager of Smart Tykes. When a child escaped while she was on the phone, Shauna didn't care and said that she wanted to work at Krusty Burger again.