Jellicent is a large jellyfish-like Pokémon whose appearance varies based on gender. Both genders have five tentacles, two of which are long with petal-shaped ends. The remaining three are short and tapered. A male is blue with a short, white crown, and a white, moustache-like collar. Its eyes are red with blue sclera, and there is one eyelash over each eye. Its long tentacles have white edges, while its short tentacles have white spots. A female is pink with a tall, white crown and a puffy, white collar. Its eyes are blue with red sclera and surrounded by two eyelashes. Its mouth is red and heart-shaped. The long tentacles have white edges like the male, but the short ones have white frills.
Jellicent can absorb seawater and project it from its head, which lets it move forward in the sea. Any ship or crew that wanders into the oceans where it dwells is never found again, and it is known to feed on life energy. It is rumored that it drags these ships into the sea and preys on its passengers.
Jellicent and its pre-evolution were most likely inspired by the Nurarihyon, a jellyfishyōkai that is either shown as a demonized jellyfish or as a jellyfish-like man who wears refined, sometimes regal, clothing. It is also possible that they were inspired by the Kurage no Hinotama, a sort of jellyfish-like will-o'-the-wisp. Its design is inspired by the jellyfish (in particular the crown jellyfish and jelly blubber) and monarch attire; the male's appearance is based on a king's while the female's is based on a queen's. The moon jellyfish may have influenced Jellicent being a ghost type. Its dangerous ability to prey on humans, in self-defense of its habitat, is possibly based on the box jellyfish and other highly venomous species of jellyfish that can kill humans. The two larger tentacles Jellicent possesses are more similar to those of squids than the tentacles of real jellyfish. Jellicent also has traits in common with sea monsters like the Kraken, most notably its rumored penchant for destroying ships and feeding on the crew.
Jellicent is a combination of jellyfish and magnificent or translucent.
Burungel is a combination of blue and angel (reference to sea angels).