Qian Ting Zong Dong Yuan 3: Caihong Baozang
English title: Dive Olly Dive and the Pirate Treasure
Japanese title: 潜艇总动员3：彩虹宝藏
Alternative titles: Happy Little Submarine 3: Rainbow Treasure
Type: Movie
Source: Unknown
Episodes: 1
Status: Finished Airing
Aired: May 31, 2013
Duration: 1 hr 19 min
Rating: PG - Children
Producers: Global Digital Creations, Splash Entertainment
Genres: Adventure
Demographics: Kids

In a secret place at the end of the world, there's a gigasmic sunken treasure with sparkling jewels and gold doubloons. When the sunlight bounces off it and shines into the sky, it creates dazzling rainbows. In fact that treasure is the source of all the rainbows in the whole world. Betcha didn't know that. Since submarines Olly and Beth are ocean explorers, they set out to find the rainbow treasure, but a whole bunch of bad guys are looking for it too. Like Snarky Sharkskin and his slippery Seahorse Gang. When the treasure's good Sea Lion Guardians turn into evil Sea Lion Pirates, the rainbow is in deep danger. If they steal the treasure, then all the rainbows in the whole world will be lost forever. Oh no. How can Olly and Beth save the rainbow? There's only one way. "Dive, Olly, Dive!"

(Source: IMDb)