What cartoon-within-a-cartoon do Bart and Lisa watch on 'The Simpsons'?

In 'The Simpsons', what is Homer's famous exclamation? In 'The Simpsons', what are the names of Marge's twin sisters? In 'The Simpsons', what is the name of the family dog? In 'The Simpsons', what is the name of the family cat? In 'SpongeBob SquarePants', where does SpongeBob work? In 'SpongeBob SquarePants', what kind of animal is Patrick? In 'SpongeBob SquarePants', what kind of animal is Mr. Krabs? In 'SpongeBob SquarePants', what is the name of SpongeBob's pet snail?