I made this solely for my lovely girlfriend who is crazily in love with this Japanese cute character. I basically found a good picture of it, pixelized it in Photoshop. Then painstakingly "paint" it pixel by pixel with countless number of shades of black, yellow, white etc. It was worth it!
Bad Badtz-Maru is one of the characters from Sanrio, same company that owns Hello Kitty.
Little info quoted from wiki
"Bad Badtz-Maru (バッドばつ丸 Baddo batsu maru?) is a male penguin with spiky hair. His birthday is April 1 (April Fool's Day). He is one of the few Sanrio characters that is marketed to both genders. In Japanese, "badtz" (batsu) is a term for "X", the cross signifying a wrong answer. "Maru" means circle or "O", and signifies a correct answer. Thus, his name figuratively means "wrong-correct," and is frequently represented by "XO". "