Sparky (Lilo & Stitch)

Sparky, or Experiment 221 as he is known by his alien codename, is a genetically created alien experiment. He resembles small light yellow Chinese dragon/Monkey/Gecko-like creature with a small body, skinny arms, stubby legs, twisted tail, an oval-shaped head, a pair of dark blue eyes, two triangular ears, and a pair of long slender antennas. His body can turn into a lightning bolt, allowing him to easily fly or travel through outlets, power lines, and machines. He was the first experiment that Lilo and Stitch turned from bad to good and first appeared in Stitch! The Movie. His one true place is powering the old lighthouse that had been abandoned for requiring too much electricity, though he offers Stitch aid. He is voiced by Frank Welker in the series.

Stitch! The Movie
In ''Stitch! The Movie'', he is the first of the original experiments to be activated (Before activation, all experiments are in pod form, excluding Stitch). He is activated by Lilo and Stitch. However, he goes on a rampage throughout the town, shorting out any electrical appliances in sight. Soon, Lilo and Stitch manage to catch him, and convince him to be good. He helps out in saving Jumba, by shorting out Gantu's ship. Lilo decides that Experiment 221's one true place is at an abandoned lighthouse, where he can make the giant sized light work again, and as it's big enough, he will not short it out when he touches it.

Lilo and Stitch: The Series
Sparky makes numerous appearances in the series.

Leroy and Stitch
Sparky reappears in Leroy and Stitch, where he and the rest of the experiments battle Leroy clones to save themselves.

Stitch!
He was under the control of Hamsterviel temporarily in an attempt to steal Stitch's Good Deed Counter. He currently works at a beauty salon on Izayoi.

Kingdom Hearts Birth by Sleep
After Terra had released the evil scientist from his prison, Terra questioned Jumba about Experiment 626. Jumba tells him that he had created him for the purpose of evil, and that he was designed to wreak havoc and destroy everything that he sees. Then, he pulls out a small green ball and a test-tube filled with water, laughing hysterically and places it in the water and then Experiment 221 appears for a battle. Later defeated, his electrical attacks no match for Terra's might, Experiment 221 is reverted back to his experiment pod form. Leaving Jumba crying over the defeat of one of his experiments as the alarms go off, Terra ventures on to a new world.

Sparky is notably the only character created for a direct-to-video Disney film or television series to have appeared in a Kingdom Hearts game thus far.

Disney Parks
Sparky can be seen in Tokyo Disneyland in certain shows and parades.

Personality
Experiment 221 prefers to be left alone, using its powers and combining them with a hot and defensive temper when provoked. He longs to be free, and is otherwise "harmless," his only goal to carry out his primary function.