Editing Experiment 221

When [[Terra]] and Jumba reach the room where [[Experiment 626]] is contained aboard the massive, galactic ship, Jumba tells Terra that 626 is evil and designed to destroy everything he encounters, but subsequently releases him. 626 then lunges at Terra and steals his [[Wayfinder]], though he drops it and leaves the room after Terra pleads with him. Terra then questions whether 626 really is evil in nature. Having become livid at his experiment's evilness being questioned, Dr. Jumba assures Terra that he is incorrect by pulling out a small green ball and laughing hysterically as he drops it into a test tube of water. Experiment 221 emerges and attacks Terra. After a battle in the containment room, Terra defeats 221, which reverts to its pod form.

Experiment 221 is a short, squat, yellow extra-terrestrial, with massive blue eyes that shine on his wide head. On both sides of his head is a small ear. Long, forked antennae protrude from the inner sides of the eyes, and large, flat teeth lie in his blue mouth beneath his domed, yellow nose. 221's belly is white and has a short tail sticking out behind him.

Experiment 221 originates from the 2003 Disney film ''{{w|Stitch! The Movie}}'' (the pilot to the animated sequel spin-off ''{{w|Lilo & Stitch: The Series}}''), in which he is a central character. In the original movie's spin-off, Experiment 221 is the first of the Jumba's other 625 experiments to be activated from pod form. He is activated by Lilo and [[Stitch]], the latter being Experiment 626 under a different name. However, 221 goes on a rampage throughout the town, shorting out all electrical appliances in sight. Soon after, Lilo and Stitch manage to catch him at a hotel and name him Sparky, convincing him to be good instead of malicious. Sparky is then given a new peaceful purpose: to provide the energy needed to power the old Lighthouse, pleasing the experiment.