Melty

Melty, A.K.A. Experiment 228, is an illegal genetic experiment created by Jumba Jookiba. He is designed to fire blue blasts from his snout that melt enemy targets. He also seems surprisingly mechanically inclined for a destructive dragon. His one true place is melting metal at the recycling plant.

Personality
Melty is a rather simple-minded experiment, taking enjoyment in melting anything in sight, even when he's captured. He doesn't talk at all, but has a tendency to be rather blunt. He is also shown to be easily irritated, but is loyal to those who win his trust.

Lilo & Stitch: The Series
Experiment 228 was the 228th genetic experiment created by Jumba with Hämsterviel's funding. He was designed to use his blue energy blasts to melt enemy fortresses, weapons and transportation. 228 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, with 228's pod landing in a palm tree.

When a gust of wind blew 228's pod out of the tree, a dog found it and took it back to its home. There, the dog dropped the pod into its bowl of water, activating 228, who proceeded to melt the house.

228 later attacked the parking lot in front of the Birds of Paradise Hotel, but was soon captured by Stitch, who used a metal chimney from the roof of the hotel.

Prior to catching 228, named Melty, Lilo fell into a mud puddle and made an idiot out of herself in front of Keoni. She and Stitch later decided to use Jumba's time-traveling surfboard to go back and change the past.

In several alternate timelines created by Lilo and Stitch meddling with time travel, Melty's fate was different:
 * In the first timeline, Lilo barely avoided embarrassing herself by falling into the pile of mud, but Stitch's change of action caused Melty to melt the hotel, and he was caught in a fashion similar to Sparky. As a result, Nani was fired, which caused Lilo and Stitch to start over.
 * In the second timeline, Lilo easily avoided her previous mistake, but when Stitch tried to react his original steps, he accidentally threw off the balance of a falling tree, which destroyed Officer Kaihiko's car, therefore putting Lilo and Stitch in prison.
 * In the third timeline, Lilo startled a butterfly that got eaten by a fish. An eagle then snatched the fish and dropped it onto a ship's window, which distracted a captain and caused his cruise ship to crash into the hotel, but Melty's fate was unknown in this timeline.
 * In the fourth timeline, Melty's fate was unknown, as Stitch left the paradox switch off, therefore causing them to meet themselves.
 * In the fifth timeline, Melty was unintentionally hurled into the ocean, where his melting blasts opened up a volcanic fissure in the ocean floor, causing a tsunami to form and destroy part of Kauai.
 * In the sixth timeline, Melty was captured exactly the same way as the original timeline, but Stitch caused a chain reaction that ultimately woke up Gantu, causing the latter to search for Melty at the Pelekais' house. After Melty melted his containment orb and their house, Gantu captured the experiment. The time-traveling surfboard was melted as well, causing future alternate timeline Jumba (whom they both accidentally met when unintentionally going forward in time) to go back and give them a new time-traveling surfboard.
 * In the final timeline, and one corresponding to the original, Lilo and Stitch imitated their previous actions, but this made Lilo forcibly embarrass herself in front of Keoni again. They captured Melty the same way and took him home. Stitch then guarded Melty like a hawk in case Gantu decided to come by, while Keoni paid Lilo a visit to cheer her up, and everything turned out better than they had expected.

In the original timeline (in which Gantu had slept peacefully and was never informed about the experiment), Melty was later found a one true place burning metal at the aluminum recycling plant.

In "Remmy", Melty was one of the experiments in Lilo's dream.

Leroy & Stitch
The first 624 experiments, including Melty, were rounded up by Leroy and taken to a stadium to be destroyed. However, Lilo, Stitch, Jumba, Pleakley, Reuben and Gantu arrived before the experiments could be destroyed.

Melty participated in the following battle between the experiments and the Leroy clones.

The Leroys soon gained the upper hand in the battle, but were defeated when Lilo, Stitch, Reuben and several other experiments performed the song "Aloha `Oe," which caused the Leroy army to shut down due to the original Leroy's fail-safe.

Trivia

 * Melty greatly resembles Mushu from Mulan in both appearance, color, and that they are both dragons. The only difference is Mushu lacks wings.
 * Melty's pod color is green.
 * Melty is described by the experiment computer screen as, "Experiment 228. Primary function: Liquefaction of enemy fortresses, weaponry and transportation."
 * Melty's body, ears, wings and tail appear in the online game Jumba's Lab.