|This article is about a/an monster in Kaizoku Sentai Gokaiger.|
An old friend of Insarn's from high school, Jealousto was in love with the scientist and willing to do anything to receive her love. However, upon learning that she is in love with Kyousuke Jinnai (Red Racer), whom he was sent to capture, Jealousto goes all out to destroy the human with his jealousy-fueled fire attacks, which include Fiery Jealousy Power (炎のジェラシーパワー Honō no Jerashī Pawā) and Jealousy Flame Slash (ジェラシー炎斬り Jerashī Honō Giri). But after being suddenly enlarged, with Kyousuke helping him win Insarn's love, Jealousto is defeated by Shinken GokaiOh. Though he survives the fight, Jealousto loses all respect from Insarn as she requests him to be launched into deep space with the garbage.
After being literally taken out with the trash, Jealousto's search for food resulted with him befriending a Takoyaki vendor who adopts him as pet, and later decides to become a Takoyaki vendor like his newfound friend, but the vendor's mother vehemently opposed the idea, as she disapproved of what she assumed was Jealousto's bad hygiene. In the end, Jealousto reconciles with his vendor friend's mother by eloping with her in order to open a hot springs inn together.
Gokaiger vs. Gavan
He was revealed to have been imprisoned by Makuu Prison Chief Ashrada along with other redeemed Super Sentai villains, with the Gokaigers not interested in hearing how he ended up there. Eventually, with the alarm was sounded, the Gokaigers freed him and the other inmates to hinder the Gormin so they can go on their way to rescuing Gavan.
Go-Busters vs. Gokaiger
Jealousto just happened to have been in the Edo Period, when he runs into Gai. Gai spotted Jealousto holding the yellow Phantom Ranger Key. Jealousto reveals that it landed it his bathtub. Jealousto participates in fighting the Zangyack until he runs off when he sees Bacchus Gill. He is seen in the credits, selling his takoyaki to the Edo era citizens.
Doubutsu Sentai Zyuohger
- to be added
Uchu Sentai Kyuranger
An alien with Jealousto's head appeared as a civilian at the Space Dragon Palace. It is not known if it is actually him or not though.
- Height - 198cm (Giant form - 49.5m)
- Weight - 149kg (Giant form - 372.5t)
- Jealousto is the first Action Commander to survive his defeat by the Gokaigers.
- Jealousto is also the first Action Commander to be grown without being destroyed first.
- His name is a pun on "Jealousy"
- His motif is the one of a sea slug.
- He is the first Action Commander to appear predominantly in more than one episode. Action Commander Zaggai, the monster of Episode 13, appeared in Episode 14, but only as a cameo.
- The entire story of Jealousto parallels the storyline behind Gekisou Sentai Carranger villain President Gynamo: both are seemingly evil beings who are in love with the main female villain (Gynamo: Beauty Zonnette; Jealousto: Insarn), yet said villain is in love with Kyousuke Jinnai instead. After ultimately failing to win their love, they are (literally) thrown out like garbage before ultimately settling down on Earth with something connected with the food industry. (Gynamo becomes a waiter at a yakiniku restaurant; Jealousto elopes with the mother of a takoyaki-stand owner)
- Jealousto's voice actor Takahiro Sakurai would later go on to voice Nick Russell in the Japanese dub of Power Rangers Mystic Force and Joe Okada (Sir Jonathan Klondike) in Doki Doki! Pretty Cure.
- Kaizoku Sentai Gokaiger
- Tokumei Sentai Go-Busters vs. Kaizoku Sentai Gokaiger: The Movie
- Super Animal War