From the Super Mario Wiki
A Grubby is a spiked form of Unera. They are described as slugs and they appear in the Tree Zone, during the events of Super Mario Land 2: 6 Golden Coins. They can be defeated by hitting a block they're on top of or by using a Star.
Names in other languages
|Combination of toge meaning "spiny" and Unera.
- ^ Super Mario Land 2: 6 Gold Coins English instruction booklet, page 13.
- ^ Super Mario Land 2: 6-tsu no Kinka Japanese instruction booklet, page 15.