Simpsons Comics Issue #42 includes The Homer Show and Slobberwacky. It was featured in a collection of Simpsons Comics called Simpsons Comics: Unchained.
Bart Simpson escapes from a family picnic to go into the forbidden woods. There, he finds a creature called a Slobberwacky. He shoots it with a bb gun, but it turns out he has shot a drunken Barney Gumble.