Baby Bop is Wonder Princess.
Wonder Princess is Baby Bop's superhero alter-ego was a female version of Captain Pickles that only appeared in the Season 12 episode, "The Amazing Captain Pickles: A Hero Adventure".
In this form, Baby Bop wears her yellow blanket as a cape. She also wears a silver princess tiara on her head. She is also named after the story is called "The Princess Without a Song to Sing".