Sheldon is a tortoise owned by Mr. Burns.
History[]
After reading Mr. Burns' will, Waylon Smithers found out that Sheldon will inherit all Mr. Burns' property and money, as his "faithful and constant companion". Mr. Burns told Smithers that it is because he doesn't see him as his equal. According to Burns, Sheldon and Smithers have never gotten along.
Appearances[]
Episode – "Flaming Moe"