||The contents of this article or section are considered to be non-canon and therefore may not have actually happened or existed.
The Fizz is a supervillain alter-ego of Nelson Muntz.
When Nelson was doing community service at Frink Labs, he drank one of Professor Frink's formulas thinking it was soda and turned into The Fizz. After this, he could turn his body into soda. The Fizz started to trash Frink Labs and made the monkeys burp. As Bartman and The Fizz fought, Gil Gunderson arrives as a ghost to help, but got distracted talking with Frink. Bart then told The Fizz that his lunch money was in the bottom of a bottle and trapped The Fizz inside the bottle when he went inside it to look for it.