|Voiced by||Kevin Michael Richardson|
|First Appearance||No Dogs Allowed (only appearance)|
Mr. Grubo had issued a ban on dogs for his apartment building so his daughter would have a chance to be accepted into the "Pony Sisters Club". He himself is a pony fanatic, having been a member of the "Pony Boys Club" in his youth, and has many pony collectibles in his apartment.
After Julie proves that she cares more for her new-found puppy, Checkers, then being in the Pony Sisters (Having thought she would be kicked out just for having a dog), Grubo apologizes for his actions and repeals the ban on dogs.