Aw, being a clown sucks. You get kicked by kids, bit by dogs, and admired by the elderly. Who am I clowning? I have no business being a clown! I’m leaving the clowning business to all the other clowns in the clowning business.— Homer
"Pixel art" is the name given to pictures which are drawn pixel-by-pixel. They do not use any line-smoothing techniques and as such, can be reduced to very few colours (typically 16 or fewer).
This type of images are common of old console video games (such as the Game Boy) which have very few display pixels and limited colours - yet the images look so realistic.