Princess Isabella

While having a touching moment with Phineas, Isabella learns she may be the hier to the throne of a place called the Fantastic Kingdom. After learning her mom found her near Amazement Lake, she, Phineas and Ferb embark on an epic adventure to reclaim her rightful place as the Fantastic Princess.

Main Characters
Isabella (main character)

Phineas

Ferb

Candace(main antagonist, uses the boys' new Shapeshifter to impose as Isabella and take over the kingdom)

Baljeet

Buford

Vanessa

Perry

The Fireside Girls

Stacy

Inventions Used
The Shapeshifter

The ATV

The Cheetah Shoes

The X-Ray Vision Glasses

The Baseball Launchers

Trivia
Dr. Doofenshmirtz and Major Monogram didn't appear in the episode.

Songs
The Life of a Princess