Poppapoppup, A.K.A. Experiment 294, is an illegal genetic experiment created by Jumba Jookiba. He is designed to keep you up all night by playing drums.
Experiment 294 was the 294th genetic experiment created by Jumba with Hämsterviel's funding. He is designed to keep you up all night by playing drums.
294 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.
Poppapoppup looks a lot like Stitch, and even has the extra arms. Unlike Stitch, he is grey, and doesn't appear to have antennae. Whether the drum set is integrated into his body or not is unknown.