Experiment 073 was the 73rd genetic experiment created by Jumba with Hämsterviel's funding. He was designed to be a corner piece for a corner Jumba couldn't do anything better with.
073 and the other first 624 experiments were deactivated and smuggled to Earth by Jumba during his mission to capture Experiment 626.
All of the experiment pods were released and scattered across the island of Kauai.
At the unknown point, he was activated, captured, tamed and named Cornerpiece.
At an unknown point, 073 was activated, captured, tamed and named Cornerpiece.
Cornerpiece is a pink blob-like experiment with a red nose and black eyes.