From the Super Mario Wiki
Glad Parabomb is an enemy found on Vibe Island in the game, Super Princess Peach.
Glad Parabomb is just like a regular Parabomb, a Bob-omb with a parachute only glad. Once it lands, it turns into a Glad Bob-omb.
According to the game's Glossary, "It gets happy when it loses its parachute. Then it skips."