Experiment 515 was the 515th genetic experiment created by Jumba with Hämsterviel's funding. He was designed to cut down entire forests. 515 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.
At an unknown point, Experiment 515 was activated and went on a rampage.
In "627", Stitch chased after 515 and managed to corner him in an alley, defeat him, and rehabilitate him. Gantu and Experiment 625 then arrived for 515, named Deforestator. While Reuben lagged behind, Gantu pointed a net cannon at Deforestator, but the latter was able to simply use his powers to force the duo to retreat.
Deforestator was one of the experiments in "Checkers" that joined Stitch in a rebellion against Gantu.
In "Ploot", Deforestator was one of the first team of experiments (along with Kixx and Richter) formed to try and stop Ploot. However, Ploot was easily able to defeat them, forcing the three experiments to retreat.
The first 624 experiments, including Deforestator, 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.
Deforestator 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 ʻOe," which caused the Leroy army to shut down due to the original Leroy's fail-safe. Deforestator can be seen in the audience cheering.
Deforestator made an appearance in the Stitch! anime when Hämsterviel disguised him as a punk and was about to use him for another plan, but called it off after developing a temporary "soft side." Because of that, he didn't really do anything during the episode (except punished Hämsterviel for failing Delia again).
- Deforestator was first revealed in a DVD bonus feature of Stitch! The Movie in the experiment gallery.
- Deforestator is the first experiment to debut in an episode not named after it, and to never have an eponymous episode. He shares this trait with Zap, who happened to debut in the same episode. Though Topper and Yaarp briefly appeared in "Elastico", they still had their own respective episodes.
- Even though Deforestator was activated off-screen, his pod color is white according to "Ace".
- Jumba refers to him as: "Experiment 515: The Deforestator"; however, his official name is mentioned in "Ploot".
- His number was also given to Splodyhead (in "Slushy") and Ploot, most likely due to Jumba's untidy database.
- Deforestator's body appears in the online game Jumba's Lab.
- Deforestator is one of few experiments to not have a known one true place.