The Boo Brothers is the name of an inept ghost-busting company run by three ghosts who may or may not actually be related.
Scooby-Doo Meets the Boo Brothers
When Shaggy Rogers inherited a mansion and treasure from his uncle, he wound up stuck in it, which was haunted. He then had Scrappy-Doo call a team of ghost exterminators. The first in the phone book was the Boo Brothers, who promptly arrived through the telephone.
Though it soon became evident they were no good at catching ghosts, they did save Shaggy from falling off the roof when he was pushed by the Skull Ghost. They proceeded to both aid and hinder Shaggy's quest for the treasure, still not managing to catch the ape, Skull Ghost, or Farquard. After saving Shaggy, Scrappy, and Scooby-Doo from a sinking boat, they assisted in capturing the Skull Ghost, revealed to be T.J. Buzby. Shaggy then gave them the mansion while he, Scooby, and Scrappy go to donate the jewelry to an Beuraguard Trust Fund For Orphans.