Splodyhead

Splodyhead, A.K.A. Experiment 619 and Splody, is an illegal genetic experiment created by Jumba Jookiba. He is designed to attack using fiery plasma blasts from his nozzle-like nose. His one true place is lighting tiki torches at the luau.

Personality
Splodyhead is an experiment controlled by his fiery disposition: he is fierce, greatly dislikes the water, and is shown to be hotheaded when provoked. He is loyal to his friends, but he does have an attitude. He can't talk, but he does understand what people are saying. He knows when he is outnumbered, so he will often pick off his victims one by one. He likes his food "well done," as Lilo puts it, which usually means he burns or melts it. While he cannot talk, he can also be intelligent and polite, as shown in "Slushy" when he thanked Jumba for fixing him so he wouldn't overheat. He is known to be hostile and apparently shares a grudge with Slushy due to his opposing elemental power, but they resolved it in "Spike".

Lilo & Stitch: The Series
Experiment 619 was the 619th genetic experiment created by Jumba with Hämsterviel's funding. He was designed to use his fiery plasma blasts to cause massive chaos and damage. 619 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.

619's pod was eventually discovered by Lilo, Stitch and Gantu, who began to chase after the pod while causing an outdoor disturbance. During their struggle, a seagull snatched the pod and took it back to its nest on a cliff face located on the Forbidden Island of Niʻihau.

When the gull was unable to peck 619's pod open, it kicked it out of the nest in anger. The pod landed in the ocean, activating 619, who jumped ashore and then proceeded to take over the seagull's nest.

Later, 619 spotted Lilo, Stitch, Jumba, Pleakley, Experiment 625 and Gantu arriving on the island for him. Irked, he strayed from the nest and attacked and destroyed both factions' camps, putting the six in jeopardy. Stitch and Gantu, believing the other one was at fault, had a short-lived battle with each other before Lilo stepped in to break it up.

When the two factions saw 619, whom Lilo named Splodyhead, invading the nest, he attacked with raining plasma blasts, forcing Lilo, Stitch, Jumba, Pleakley, Reuben and Gantu to take cover. Using his plasma attacks, Splodyhead managed to keep the six trapped, but refused to come down to finish them off, due to him being outnumbered. He then waited quietly to pick them off one by one.

Meanwhile, Stitch and Gantu resumed their conflict, since they both thought the other one was evil. Lilo then told the two rivals that if they wanted to be rescued, they would have to put their differences aside and try to work together. Stitch and Gantu initially refused, but after both factions took a vote, Lilo was nominated to lead them and plan out Splodyhead's capture.

During the night, the six built a decoy raft that was set afloat as bait, which Splodyhead targeted and blew up. Convinced the danger was over, Splodyhead left the nest, thus allowing Jumba and Lilo to ambush him and temporarily incapacitate his weapons with water. Defenseless, Splodyhead attempted to escape back to the nest, but was stopped when Stitch tackled him, enabling Gantu to capture him in a makeshift net and put him into a containment orb.

Realizing they had worked together, Stitch attempted to make amends with Gantu by shaking hands with the latter, but Gantu resentfully pushed the former aside. However, Lilo briefly lectured Gantu's brash nature before the two factions and Splodyhead were eventually rescued from the island by Nani and David driving motorboats.

Splodyhead was shortly after taken back to Kauai, where Lilo and Stitch found him a one true place lighting tiki torches at the luau.

In "Houdini", Splodyhead was one of the audience for Stitch's bungled magic act.

In "Slushy", Jumba adjusted Splodyhead's thermostat so he wouldn't overheat in hot climates. Later, Splodyhead was sent to Slushy's ice palace to defeat the latter. After a long, drawn-out battle between the two experiments, Splodyhead was defeated when Slushy froze him into a block of ice. He was later freed, and blasted a ball of fire into the sky at the top of Waialeale Peak to clear Slushy's snowstorms.

Splodyhead reappeared in "Slugger" as part of Lilo's softball team.

In "Spike", Splodyhead was one of the experiments in Pleakley's E.A.R.W.A.X. group. When a stray snowball from Slushy accidentally hit Splodyhead, who kept suffering from boredom, a battle ensued between the two experiments, which ended when Pleakley convinced Slushy and Splodyhead to attempt hugging therapy on each other.

Slushy and Splodyhead were seen on a computer screen in "Ace", posing as evil creations of Jumba's as part of a hoax to fool the head of E.G.O.

Leroy & Stitch
Splodyhead was seen early in the movie as Lilo was making her rounds with Scrump to make sure all the experiments were happy in the one true place they belonged.

Later, the first 624 experiments, including Splodyhead, 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.

Splodyhead participated in the following battle between the experiments and the Leroy clones by blasting Leroys away with plasma attacks.

However, 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.

Stitch! anime
Splodyhead has appeared three times in the Stitch! anime, twice with Plasmoid. In the first appearance, he and Plasmoid fought against Stitch when he was hypnotized by Swirly into fighting for Hämsterviel. In the second appearance, he and Plasmoid were modified by Hämsterviel to attack Stitch. Splodyhead was given a modified ability to fire purple balls of a repulsive odor. Also, after the effects of Hämsterviel were reversed, Splodyhead was able to expel a pleasant aroma, the opposite of his modified ability. He made a third appearance in aiding Stitch in battle against Dark End.

Trivia

 * Splodyhead's pod color is blue.
 * Splodyhead is described by the experiment computer screen as, "Experiment 619. Primary function: Plasma fire shooter."
 * In the "Slushy" episode, Jumba erroneously refers to him as 515, a number taken by Deforestator.
 * Splodyhead's head appears in the online game Jumba's Lab.
 * Splodyhead made a cameo in Big Hero 6 as one of the pillows on Fred's bed.