Brightburg was a city that used to neighbor and rival Dimmsdale. As of now, Dimmsdale no longer considers Brightburg a rival city due to it being named worst place to live.
It was a very futuristic, clean looking place that was constantly voted over Dimmsdale as the best place to live. The city was unintentionally destroyed by Timmy when he wished for a giant trampoline, which deflected a hail storm of mini-van sized ice chunks in the direction of Brightburg, raining destruction down upon the city. Shortly afterward, Timmy wished Dimmsdale to be encased in a Jell-O mold to protect it from an earthquake, causing the shockwaves to furtherly devastate Brightburg. What little of the city that remained was destroyed by the Jell-O mold pieces that were flooded down on Brightburg. Nobody in Dimmsdale cared about it as stated by Chet Ubetcha who was number one again since Mrs. Turner was fired from her position as weatherperson due to predicting weather that could destroy Dimmsdale and the said weather came true due to Timmy's wish. The town was then apparently voted as worst place to live according to what Chet said in the news.
Dimmsdale Hating Brightburg might be a parody of Springfield hating Shelbyville from The Simpsons.