Igglybuff is a small, bipedal balloon-like Pokémon that is completely pink. Its body can turn deep pink when the temperature increases, or when it sings continuously. It has a rounded tuft of hair on top of its head, a small swirl-like pattern on its forehead, and red eyes. Igglybuff has small, stubby limbs, and is usually seen levitating in the air. Rather than walking, this small Pokémon bounces like a ball to move around, as its body is extremely soft and elastic — although it may not be able to stop if it does this. As Igglybuff moves, it secretes sweat with a sweet fragrance, which calms the emotions of its foes.
Although it has singing abilities, Igglybuff is not able to sing for long periods due to its underdeveloped vocal cords. It often gets a sore throat from singing too frequently. When Igglybuff gets praised, its singing slowly becomes better and better. Igglybuff tend to live in the grasslands close by freshwater streams. It uses water from the streams to gargle in its sore throat.
Two Igglybuff twins, nicknamed Gigglybiff and Gigglybuff, made their main series debut in Same Old Song and Dance, under the ownership of Brittany, who was practicing for a concert with them. Jigglypuff was jealous of them as they were stealing its audience.
Igglybuff, which evolve into Jigglypuff, are so incredibly elastic that they always seem to be bouncing. They have stubby legs, so for these Pokémon, bounding from place to place is much faster than walking. Unlike its equally adorable relatives, Jigglypuff and Wigglytuff, Igglybuff has red eyes.
Igglybuff stars as the player character in the special episode Igglybuff the Prodigy. This Igglybuff is the unevolved Guildmaster Wigglytuff from the main story.
Pokémon Stadium 2: Igglybuff appears in a quiz-show styled mini-game alongside Cleffa. A series of Pokémon parade across the screen and the player has to count how many of the Pokémon species the player is instructed to count parade across the screen. The score is based how close the player is to the right number.
Igglybuff appears to be based on a balloon due to its inflatable body. Its soft fur and singing ability may be based on plush toys that play music to help children fall asleep. Its round shape resembles a powder puff or a cream puff, and its pink color, rubbery skin, and ability to learn Bounce are similar to a rubber ball.
Igglybuff may be a combination of jiggly or wiggly and buff (a pale, soft, flexible leather).
Pupurin may be a combination of プチ puchi (petite) and プリン purin (pudding; referring to its soft body).