Pianosaurus

Pianosaurus is a toy produced by Playtime Co. and a minor antagonist in Chapter 4: "Safe Haven". He was first discovered after the photoscan 6 photo was decoded in the Chapter 4 Icepick ARG. He's a dinosaur with a piano-like mouth, featuring rainbow-colored spikes along his back and a green body. In 1990, Playtime Co. created his Bigger Bodies counterpart, Experiment 1163, though Harley Sawyer ultimately determined he was a failure and was reassigned to "testing".