From the Super Mario Wiki
Glad Red Koopa is an enemy found on Vibe Island in the game, Super Princess Peach. They have been affected by the vibe scepter.
Glad Red Koopas are like regular red-shelled Koopa Troopas, only these ones skip and have a darker skin color. Their way of attack isn't really different, either.
According to the game's Glossary, Glad Red Koopa is "A Koopa Troopa who has learned to jump happily."
Names in other languages
||Koopa Rouge Joyeux
||Glad Red Koopa