Chubby is a Monty Mole who hides in the holes of Moo Moo Farm, both the Mario Kart 64 and the DS versions. Occasionally, he'll pop out of his hiding spot and hit any racers who happen to be driving near his home, making them spin out.
- Although he is referenced in the Mario Kart 64 manual as a single mole, multiple moles can be seen popping out at the same time. Which doesn't make much since...
- In Mario Kart DS, he is not named in the instruction booklet, so perhaps it is not Chubby on the retro remake.