Jellyfish (Mario & Luigi: Superstar Saga)

A humanoid species of jellyfish appears within the game Mario & Luigi: Superstar Saga and its later Nintendo 3DS remake. During the events of the game, a total of three of them appear in Gwarhar Lagoon, and one in Beanbean Fields. They include the Jellyfish Sisters, Gigi and Merri, and two unnamed jellyfish children. One of the jellyfish children is a girl dressed in a red bow and a dress, and acts as a receptionist to the Jellyfish Sisters' Relaxation Room.

The other jellyfish child is encountered on the Beanbean Fields coastline, near a Surfing Spot on the edge of Oho Ocean. They are dressed in red swimming trunks. When spoken to, this jellyfish recommends shoving something into the Surfing Spot to turn it into a surfboard, hinting that this may be done by having Mario hammer Luigi into it using the Dunk Hammer.

In Mario & Luigi: Superstar Saga + Bowser's Minions, the Minion Quest: The Search for Bowser mode introduces a fifth child jellyfish, a girl with a purple bow and dress, who acts as an announcer and judge for Wendy O. Koopa's "Cutie Battle Contest".

In the original Game Boy Advance title, their faces are a bright, light purple and in the later Nintendo 3DS port their faces are a blackish-blue.