From the Super Mario Wiki
Green Gloves are green Bandits that hold baseball gloves in the games Super Mario World 2: Yoshi's Island, Yoshi's Island: Super Mario Advance 3 and Yoshi's Island DS.
Green Gloves are the catchers in the Baseball Boys, and use teamwork with their yellow-colored counterparts, Sluggers. If Yoshi throws an egg toward one, they will catch the egg, aim at Yoshi, and throw it back at a high speed. If Yoshi is hit, it can knock him off a platform and into a bottomless pit or spikes.
Ground Pounding their heads or stepping on them repeatedly will defeat them. However, they're immune to a Yoshi's tongue, so eating them is impossible. They can also be used to reach items like Flowers that are out of reach by ricocheting an egg off a wall.
In the Yoshi's Island DS Island Museum, there are five Green Gloves and two Egg-Plants.
Names in other languages
||From "fangen" (to catch) and Bandit