He is Remy Buxaplenty's fairy godparent, was once Wanda's boyfriend and bullied Astronov in school. He mostly flirts with Wanda and Neptunia. In "Blond-dissimo", he laid eyes on Wanda's twin sister and Trixie's fairy godparent, Blonda and they've quickly became a couple, and soon after, Juandissimo stopped flirting with Wanda and Neptunia. Juandissimo's main role was in the two part special, "Mr. Crocker, You're Fired" and "The Night Magic Died", where he was captured by Ms. Doombringer. She spared his life by allowing him to work with her, but Juandissimo denies it. However, Doombringer quickly reasons with him, and told him that he will be the most accomplished fairy in the universe if he do what she says. Little did he know, it was all a lie, so that she can destroy the Big Wand and make every fairy in existence dissapear forever. Near the ending of part two, Cosmo and Astronov confronted Juandissimo and tried to reason with him. After having some common sense put into him, Juandissimo apologizes for what he's done, and for his behavior back in High School. Juandissimo's quickly agreed to help defeat Ms. Doombringer, and he, along with Cosmo and Astronov put their past behind and became friends from that moment on.
Although not as big as Jorgen Von Strangle, Juandissimo looks more muscular than most other fairies. He speaks in a Mexican-Spanish accent and thinks that he is the best looking fairy in Fairy World. He has black hair in a pony tail, with purple highlights, and wears a white shirt that often rips whenever he strikes a pose. Juandissimo's iris color is purple, which is also the color of whenever he shape-shifts into.