Frillish is an aquatic jellyfish-like Pokémon that also share some traits with octopuses. Frillish's appearance varies depending on its gender. A male Frillish is blue with a frilly collar around its neck, similar to a clown while a female Frillish has a fluffy ruffle collar and is pink. Females have ruffle decorations on the tentacles while males have their tentacles with pale blue rhombuses on it. A female Frillish is pink with ruffle like decorations on its smaller tentacles. Both the male and female Frillish have a pattern around their crown like hairstyle while females have a round one while males have a triangular pattern. Males have a frown on their face and have red eye color with blue straight lines and surround color while females have a smile on theirs and have blue eye color with curly lines along with their surround color. Both Frillish have a different skin color; males are blue while females are pink depending on their gender.
Frillish and its evolution, Jellicent, are the only Pokémon to have the Water/Ghost-type combination.
Frillish is one of the three Pokémon introduced in Generation V which have Gender Differences. The others are its evolution, Jellicent, and Unfezant.
The male Frillish is based on a prince, while the female Frillish is based on a princess (hence their appearances).
Before officially released, Frillish was originally going to be a pure Water-type Pokémon only, which is related to gorgeous and cute princes and princesses. However, in order to balance the game, it was soon added the Ghos-type, and also sum up a setting of "Sea Monsters".
There is even a saying that Frillish is actually the souls of dead babies, who are finding their own parents with hatred.
Frillish is based on a jellyfish. It also slightly resembles an octopus.
Frillish is a combination of "frill" and "jellyfish".