Shyster is a Maxis-made cell found in the Cell Stage at Level 2. It is the fastest herbivorous cell in Level 2, and is related to the Spiked Shyster, so it won't be attacked by it.
Shyster's notable feature is its secret filter mouth, resembling lips. It's the only cell that possesses this filter mouth. It possibly a female version of the Spiked Shyster. It will make a "hahaharereroererereehreea", "eek hahaha" or other noises when hit. When it is small, it makes a similar noise, "hihihihihihiihiihiireereereereeree".