Role in the series
Rainbow Falls first appeared in the episode "Surfin' Turf" While fleeing from Tick-Tock the Crocodile, Captain Hook and Mr. Smee get caught in Rainbow Falls current but quickly grab onto some low hanging vines leaving Izzy's surfboard to the falls. Jake and his crew along with Marina soon arrive. Jake and Marina quickly swim up to the board before it goes down the falls and just before they do Izzy throws her pixie dust onto the surfboard allowing Jake and Marina to fly through the sky on it.After the ride Jake and his crew drop Marina off back at Mermaid Lagoon and continue surfing. While they're surfing, Hook frees himself from the vine only to be chased away by the crocodile.
Rainbow Falls reappeared in the episode "Jake and Sneaky Le Beak!" Hook and his crew prepare to sail to the Rainbow Falls to find the Splendor Gem located behind the falls when Beatrice Le Beak and her pet falcon Fast Claw arrive Hook grants Beatrice permission to come aboard his ship when she over hears Hook and his crew going on a treasure hunt for the Splendor Gem when Beatrice takes commands of Hook's vessel the Jolly Roger leaving Hook, Smee, Sharky and Bones a drift in her rowboat. Luckily, Jake and his crew were sailing nearby and decided to help.
Reluctantly Hook except the puny pirates help and gave chase after the Jolly Roger. At Rainbow Falls Le Beak has abandon ship leaving Fast Claw to watch the ship while she search the falls for the gem. With Skully's help Fast Claw is trick off his post allowing Hook and his crew to take command of the Jolly Roger once more. Captain Hook refuse to allow Le Beak to beat him to the treasure Hook gave chase and confronts Beatrice behind the falls. As the two greedy pirates battle for control of the Splendor Gem they fall through the entrance behind the falls but are rescued by Izzy and her pixie dust losing the Splendor Gem to the Never Sea.