This is Gastro-Man from my comic, The Extraordinary League of Christianity... a bit more detailed picture of him though.
If you don't know yet, his real name is Cory Dawson and he is a LOVER of eating! He gained the power to grow his body when he was hanging out with is "so called friends." They found a scientific radiation experiment. Cory got caugh in it accedentally and his friends left him. Though it's hard, Cory strives to accomplish the mission to forgive his "once upon a time friends."
He also has a lot of gas and uses it to smell out the bad guys, make a smoke screen, and he uses it like sleeping gas. :)