It's Blastoise from Pokémon! Drawn in Photoshop one pixel at a time. Roughly 90 pixels wide and 80 pixels high.
Side Note: This is not a screenshot. I looked at the Pokémon production art from a guide book I own and drew this from that.
Side Note: This is not a screenshot. I looked at the Pokémon production art from a guide book I own and drew this from that.