He's basically just a dog that says things. You use Comic Sans font, and different colors (usually). And you use adjectives in front of the words like "so..." "very..." "much..."
DYING OF LAUGHTER? AIN'T NOBODY G-Haha; Haha; Haha Hee Hee Whahaha; Oh Hee Hee Ho Ho Whaha Ha Ha; Mmmpfwhaha; Whooooo; OH NO; HO HO HO; HA HA HA; HEE HEE HEE; *YEURK*