You caught a Jigglypuff!
Jigglypuff, known in Japan as Purin (プリン?), is a Pokémon species in Nintendo and Game Freak’s Pokémon franchise. Created by Ken Sugimori, Jigglypuff first appeared in the video games Pokémon Red and Blue and subsequent sequels, later appearing in various merchandise, spinoff titles and animated and printed adaptations of the franchise. Jigglypuff is voiced by Rachael Lillis in English and by Mika Kanai in Japanese. In live action musical Pokémon Live!, Jigglypuff is portrayed by Leah Smith.
Known as the Balloon Pokémon, Jigglypuff evolves from Igglybuff when it reaches a certain point of happiness, and evolves into Wigglytuff when exposed to a Moon Stone. Its name is a combination of the words “jiggly” and “puff”, intended to relate to its jelly-like appearance. The character has been featured in a recurring role in the anime series and served as the focus for several printed adaptions of the franchise. Since it appeared in the Pokémon series, Jigglypuff has received generally positive reception. It has been featured in several forms of merchandise, including figurines, plush toys, and the Pokémon Trading Card Game.