From the Super Mario Wiki
Neijī (ネイジー) is a rare enemy that can be found in the Mario Zone of Super Mario Land 2: 6 Golden Coins. It is a living screw that appears only near the end of the first level of this zone. They wind themselves out of the ground and bounce toward Mario to attack, attempting to drill into him from above. They can be defeated by jumping on them or using a Fireball.