In this, the final episode written by GoldenAge ''Simpsons'' writer Jon Vitti, Nelson moves in with the Simpsons while Lisa purposely starves herself to lose weight in her allegedly big butt.

!! Tropes:
* BittersweetEnding: Nelson is reunited with his dad, but Lisa's body image issues haven't been resolved, as she still feels like she's too fat, even after Nelson got revenge on her bullies, she finally ate some cake, and Homer begged Lisa to change her mind about it.
* DisappearedDad: Bart finds Nelson's dad, who had been in a freak show after suffering a peanut allergy (which contradicts several past episodes that imply that Nelson's dad wasn't around because he's either in jail, abandoned his mom because of her cough drop addiction, or went insane. On top of that "[[Recap/{{TheSimpsonsS9E6BartStar}} Bart Star]]" and [[Recap/TheSimpsonsS4E14BrotherFromTheSamePlanet Brother From the Same Planet]]" showed Nelson's dad).
* TakeThat: Bart decides that going crazy and jumping into a cake is better than singing [[BarbraStreisand Streisand]].
* UngratefulBastard: Bart finds Nelson's dad but Nelson can't (or so he says) stop bullying him.