Simon (The Little Mermaid)

Simon is a sea dragon from The Little Mermaid series; imprisoned in cave and looking to be rescued. He writes a message and puts it in a bottle and with some luck, Ariel, Sebastian, and Flounder find the letter, brave danger en route to the cave, and then they face a giant sea monster. The monster turns out to be Simon himself, the writer of the message, who's looking to have a party with some new friends. Bringing Simon home to King Triton poses another challenge until Simon helps King Triton to save Atlantica and its merpeople from an invasion of evil sea creatures.