Sky High was having an Australian trip to learn about wildlife in Australia and how to survive in the wild. They were in a submarine rented from the harbors of Sydney. Will and friends were looking around when they saw a school of fish in The Great Barrier Reef. Lilo thought it could be more fun if she used her mermaid power.
Twilight teleported them along with CLST, and Tori and she activated her mermaid power from her amulet. "You guys look gorgeous." Rarity said.
"I want to meet The Little Mermaid," Sunny said.
"Or perhaps a sea witch," Lec said.
"Twins," Cho whispered.
Inside the sub, the Pokemon Pets were looking around when Tranquility got sent into a torpedo thing, thinking it was a bed. The Pokemon pets grabbed their scuba suits rarity made in case they want to swim and came inside. Mr. Boy accidentally pressed the button and sent the Pokemon Pets out.
The Pokemon Pets decided to find their masters.
Meanwhile, The Celestian Alliance, CLST, and Tori swam around and saw a clownfish with a seahorse, a Flapjack Octopus, and a butterfly fish. They were Pearl who had one tentacle shorter than the others, Sheldon, who's H20 intolerant, Tad is obnoxious, and Nemo who has a shorter fin from a barracuda accident that killed his mother.
"I know how you feel." Magenta said, "My father died when I was little."
"Plus I never met mine." Layla said, "My mom abandoned him before I was born."
"Sting Ray!" Stitch shouted.
A manta ray came in, he was, "Mr. Ray" he took his class to the edge where Pearl, Nemo, Sheldon, and Tad wondered off and thought they would dare one of them to touch a boat. They let Nemo do it only for him to be captured by scuba divers. Then they rode off. "Oh, my!" Fluttershy said
The trio rushed back to Mr. Ray and told him everything. Mr. Ray decided to give them detention for wondering off.
During detention, Mr. Ray told Marlin what happened which freaked him out, "I have to save my son!" Marlin shouted.
The Celestian Alliance decided to help Marlin save his child from harm.
They swam off only to find a blue fish name, "Dory" who suffers short-term memory loss. She said that she kind of remembers what the boat was and she'll help them along the way.