Isabella the Little Mermaid

Isabella has become the beautiful mermaid to go under the sea with her friends Phineas, Ferb, Timon, and Pumbaa.

Summary
Phineas and Ferb went to the beach while Candace was sitting in the sun. Later, Isabella, Timon, and Pumbaa came here to hang out with them. She wish she could become the little mermaid until Phineas got the ideas.

After they build it, Isabella goes first and they test it until the test is complete when Isabella become the mermaid. Phineas, Ferb, Timon, and Pumbaa decided to become the mermaids as well and dive under the sea to their new adventure.

Meanwhile, Perry was on a mission is to stop Dr. Doofenshmirtz for stealing atlantis for his own city. Back at the beach, Candace just look and saw the machine and decided to check it out until she become the mermaid. She's so glad that her brothers made her.

Back at the sea, Phineas and his friends travel through the ocean until they hear the music coming from. They decided to follow the music until they the fish dancing and met the musicians crab name Sebastein.

Trivia
Timon and Pumbaa recognize their friend Sebastein and their nemesis Ursula.

Candace is not mad because she became a mermaid.