Experiment 048 was the 48th genetic experiment created by Jumba with Hämsterviel's funding. He was designed to "echo" everything you say through its big mouth on its forehead.
048 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 an unknown point, 048 was activated, captured, tamed and named Echo.
Echo is a purple and green elephant-like experiment with tentacle-like arms and rabbit-like ears.
- Echo is described by the experiment computer screen as, "Experiment 048 Primary function: Refracts sound waves".