Experiment 556 was the 556th genetic experiment created by Jumba with Hämsterviel's funding. He was designed to make the perfect iceberg with its back side of his body.
556 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 Berg II.