Artwork (or Clip Art) is what we call "image character". Artworks are usually the ones that feature images only one character in your image with no background (usually), or no color is invisible. Sometimes they may not have transparency, but this case is difficult. In most cases the Artworks are used for banners, buttons, etc. games. Below you can see Artworks made ​​officially by me.

Fan Arts:

Inazuma Eleven

Fubuki Shirou
Sonic the Hedgehog
Sonic the Hedgehog
Shadow the Hedgehog
Ga-Rei
Tsuina Takigushi
Kingdom Hearts
Axel