From the Super Mario Wiki
When a Hefty Goonie gets swallowed and then spat out, it loses its wings and becomes a Bowling Goonie. Bowling Goonies roll around the level for their primary method of attack. They can be defeated with a ground pound. They first appear in Super Mario World 2: Yoshi's Island and its remake, Yoshi's Island: Super Mario Advance 3.
For some odd reason, Yoshi can eat Hefty Goonies; however, he can't eat Bowling Goonies.
They also appeared in Yoshi's New Island.
Names in other languages
||From "kullern" (roll) and "Birdie" (The german name of Goonie)
- ^ Super Mario World 2: Yoshi's Island Nintendo Player's Guide. Page 126.