Augustus "Spike" Jones is a monster and employee at Monsters, Inc.
Although Spike does not physically appear in the prequel, his picture can be seen on a Scare Card during the credits. It is also revealed in Monsters University that he graduated from Fear Tech and formerly worked at Fear Co.
He is a large, obese red slug-like monster with an orange face, and tons of purple spikes on his back. He can retract the spikes whenever he wants.