The Mashed Potato monster

A creature spawned from the deep pits of the kitchen, after a bit of radioactive meteorite accidently mixed with a batch of bad mashed potatoes. The resulting creature quickly grew to gigantic size and wreaked terrible havoc on the unsuspecting populace

Potato Monkey

Potato Monkeys are strange, tuberous mutations resulting from a group of wild Rhesus monkeys consuming a pile of radio active potatoes. They still retain their wild and crazy monkey mannerisms, with the additional protection of being able to see in multiple directions at once.

Octospud

A bizarre mutation resulting from one misguided scientist's attempt at cooking a baked potato in the CERN Hadron Collider, the Octospud quickly escaped into the French countryside. Sightings have been sporadic, besides a few reports of cattle mutilations.

Not to be confused with the PotatoPus.

PotatoPus

A strange crossbreed of Potato and Octopus, the Potatopus roams the countryside, feeding on those who cross it's path. It's dense, fleshy body is able to adequately absorb bullet impacts without harm, although the creature is highly vulnerable to microwave radiation.

Necro Tater Head

When a young Necromancer wants to start trying new things, his toy collection is often the first thing to suffer. Taking a wooden cart, a propeller and Mr. Tater Head, its possible to create a Necro Tater Head. The best part is that on top of it being able to fly and wheel around, you can stick things to it and have it scream back at you.

Thanks to my pal Rendragonclaw for the name and bio of this entry:

http://rendragonclaw.deviantart.com

Fry Head

Fry Head started his terrible existence as a marketing ploy, designed to appeal to children in order to sell more hamburgers. He was genetically engineered using human, bovine, and potato DNA to be the new spokesman for McFlunky's chain fast Food restaurants. Unbeknownst to all the McFlunky corporation is the cover for a vast underground terrorist organization headed by the evil clown master Spunky McFlunky. Fry Head now servers as McFlunky's stooge, using his great strength and sadistic nature to subjugate mankind and take over the world.

Two days a week he works in the drive thru. He is next in line for night manager.