Roles in the series
Neptune City first appeared in the episode "Undersea Bucky!" While surfing the waves aboard Bucky Jake and his crew spot Marina in a rush with her dolphin friends informing Jake and crew underwater mermaid city of legend Neptune City has gone dark and the puny pirates offer help. Bucky reveals to the crew the ability to transforming into a submarine, allowing the young pirates to follow Marina beneath the waves. Unknown to Jake and his team, Captain Hook and his crew were spying on them yet again. Giving up his hunt for the Jolly Roger's missing anchor, Hook and Mr. Smee follow to discover whatever undersea treasure they may be after.
As Jake and his crew explore the wonders of the depth of the Never Sea, they discover that the Pink Pearl was knocked out of the Neptune statue hand by the missing anchor of the Jolly Roger. While Marina and the sea pups try to restore the pearl to its resting place, they run into Captain Hook and Mr. Smee who were originally on the hunt for the missing anchor but Hook couldn't pass up a chance to swipe the pearl from the puny pirates. He was thwarted yet again by the young pirate team, and was sent fleeing back to the Jolly Roger along with Smee and the missing anchor, with a hungry shark in pursuit. Marina restored the pearl back to the statue as the warm glow of the Pink Pearl called the mermaids back to their home.
Neptune City makes a brief reappearance in the episode "Cubby's Pet Problem", Stormy's help guide Jake and his crew find the Cave of Neptune. Stormy heard legends say that an amazing sea creature lives there, but no one's ever seen it.
Neptune City makes another brief appearance in the special episode "Jake's Never Land Rescue", Jake follows the magical ball of light sent by The Guardian to Mermaid Lagoon, Jake learns from Marina and Stormy, that the magical ink from the Golden Squid will restore Cubby's map, while Jake is being chased by the squid, Neptune City can be spotted. After retrieving the ink and continuing his quest to save Never Land from vanishing, Neptune City vanishes. Neptune City later reappears once a new Forever Tree grows, and Never Land is saved.
Neptune City makes a brief appearance in the episode "Jake's Royal Rescue", while Queen Coralie is held captive by Captain Hook and his scurvy crew. As Queen Coralie sings a song about her kingdom to Smee, Sharky, and Bones, they envision what it may look like.