Jam, A.K.A. Experiment 202, is an illegal genetic experiment created by Jumba Jookiba. He is designed to use his high-pitched shriek to jam radar. His one true place is with Keoni Jameson as his pet. He is voiced by Frank Welker.
He was activated at the end of Stitch! The Movie. After activation, he flew through the cities, jamming TV signals and radio towers. After being captured by Stitch, it was discovered that not only did Keoni love bats, but Jam had an attraction to Keoni because his father worked in several businesses.
Jam is a purple bat/lizard-like experiment with four arms, a lion-like tail, large wings on his shoulders and a Stitch-like face.
Jam's screech is expelled in multiple frequencies which can interfere with radio and radar frequencies, therefore "jamming" them.