Gumball has lovingly assembled a Gross Jar consisting of some very unpleasant ingredients.
When Dad accidentally puts it in the microwave,
the atomic power brings the mess to life.
Soon Gumball and Darwin become attached to this cute mutant “baby” and call it Kenneth.
However as Kenneth increases in size he eats the mail man, and then Anais, Dad and Mom.
Darwin convinces Gumball to overcome his maternal affection for Kenneth and rescue his real family from inside Kenneth’s belly.
After a heroic rescue attempt from Darwin fails, Gumball accidentally saves the day...