The Dinklebergs

The Dinklebergs (Sheldon Dinkleberg and Mrs. Dinkleberg) are the next door neighbors of Mr. Turner & Mrs. Turner. The Turners seem to have a one sided rivalry with the Dinklebergs do to that since they never had children they are able to afford many things such as fancy meals and luxurious items, and this causes the Turners an immense amount of jealousy to no end, but are thankful they have Timmy. Mr.Turner's hatred and jealousy of the Dinkleburgs (particularly Sheldon) is similar to Homer Simpson's, another moronic cartoon dad, hatred of Ned Flanders and the Flanders from The Simpsons ,which Butch Hartman is a big fan of.

Early Life
Mr. Turner and Sheldon have been one-sided "rivals" since childhood. Before Mrs. Turner married Mr. Turner she dated Sheldon. However when Mrs. Turner lost her money she was immediately dumped by Sheldon who eventually married his current wife Mrs. Dinkleberg.