Glad Piranha Plant
From the Super Mario Wiki
The Glad P. Plant (short for Glad Piranha Plant) is an enemy found on Vibe Island in Super Princess Peach. Unlike regular Piranha Plants, they are yellowish-orange and are capable of hopping up and moving around. They also come with the ability to spit fireballs.
According to the game's Glossary, it "Dances around happily and spits fireballs."