This is Numberblock 9. He sneezes all of the time.
Not to be confused with Kirby (the vacuum cleaner)'s cousin.
Sneezing is the basically the action of going "ACHOO!", or as the fancy people say, a 'convulsive expulsion of air from the lungs coming through the nose and mouth'. But we don't care about what the fancy people say. It is very similar to that of a fart, except that a fart traces its origins from one's gluteus maximus, while a sneeze originates from one's nasal cavity. Sneezing is also a sport performed worldwide which involves whoever taking part being covered in snot.
The simple sneeze may trace its origins to viral and bacterial diseases often spread around to others by a certain Numberblock, which are often common colds. These mortal diseases can often cause certain square Numberblocks to have a 'tickly nose' for some reason, and then end up sneezing out smaller square Numberblocks, oddly enough, as forms of nasal mucus, leaving behind a 'square with a hole' or something. The aforementioned smaller squares are then forced back inside of the bodies of certain square numbers.