Blockhopper

A Blockhopper is a robotic creature found in most desert levels of New Super Mario Bros.. They resemble PIle Driver Micro-Goombas of Super Mario Bros. 3, but are, as aforementioned, robots rather than Goombas. Also, contrary to the Pile Driver Micro-Goombas, they'll disguise themselves as both blocks and ? Blocks, posing much more of a threat to Mario and Luigi.

Interestingly, the Blockhopper will hop in tune with the music playing, much like the other enemies will dance to it. To know if a ? Block is a Blockhopper or not, make sure you see if the question mark is moving or not - if it isn't, then it's a Blockhopper.

To defeat a Blockhopper, perform a ground pound from above.