Rainbow Butterfly Unicorn Kitty, officially shortened to RBUK (/ɑːrbʌk/), is an American animated television series created by Rich Magallanes[2] and based on a concept by Melissa Reale.

Her best friends; Miguel, a down-to-earth Anubis chihuahua, Athena, a book-smart owl, and Yana the ditzy yeti, accompany Felicity on their various mythical adventures in Mythlandia, a city full of fairy tale creatures, wizards, giants, dragons, and much more,[1][7] while also occasionally hanging out together at Mythic Malts, a restaurant owned by Moona that sells delicious malts, to cool down.

When Felicity comes to the aid of a stinky stranger named Rip Van Stinkle, he vows to be at her beck and call for life.

Rainbow Butterfly Unicorn Kitty is produced by Funrise, who took over production of the series for Saban Brands after its closure due to the sale of the majority of its entertainment properties to Hasbro.

The series returned to Nicktoons on June 21, 2019, starting with the episode "The Trouble with Travis", and premiering all segments on separate days.

Emily Ashby of Common Sense Media gave the series 2 out of 5 stars; saying that, “Felicity's unique nature makes her a decent example of embracing uniqueness in yourself and in others, but the show's frantic pace and distracting visuals tend to overshadow this positive quality.”[38] The associated toy line for the series by Funrise Toys is planned to cover many categories such as figurines, playsets, bobble heads, plush and dress-up.