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 an 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.