Chomper is a Predator-sized Maxis-made cell, first encountered as a predator-sized cell in Level 1 of the Cell Stage. Chomper is the second fastest Level 1 cell, the fastest being Goldy. In the easy and normal difficulties, in middle of the first level, a scripted event causes a predator-sized Chomper to kill a Pokey, giving the player the spike part.
Chomper makes an "orrrf" noise when hit. It may be related to Jawhead because of its similar colors.
Strangely, before you collect the spike part in Easy/Normal, Chomper appears rarely, but afterwards, they appear numerously.