Or 'Which old cartoon had a character that always wore a red hat?' This question leaves it open to various possible cartoons and characters.
Another might be 'What was the name of the main villain in the classic cartoon X?' Here, you'd need to fill in a specific classic cartoon. Maybe something like 'Tom and Jerry' or 'Looney Tunes'.
One could be 'Which was the first cartoon to feature a talking animal?'
In which cartoon can you find a talking cat? (Well, there's Tom from Tom and Jerry. Also, there's the Cheshire Cat in Alice in Wonderland.)
One could be: In which Christmas cartoon does Santa Claus get lost? Another might be: What's the name of the reindeer with the shiny nose in a popular Christmas cartoon?
One question could be: Who is the main character in the Christmas cartoon 'Rudolph the Red-Nosed Reindeer'? The answer is Rudolph, of course!
One question could be: Who is the main villain in 'The Lion King'? Answer: Scar.
Question: Who is the main character in 'Peppa Pig'? Answer: Peppa Pig herself is the main character.
One question could be: In which Christmas cartoon does Santa's sleigh get stuck in a chimney? Answer: 'Rudolph the Red-Nosed Reindeer'.
Well, one could be 'Which cartoon animal is known for its big ears and love for honey?' The answer is Winnie the Pooh.
Which cartoon character loves to eat honey? The answer is Winnie the Pooh.
Who is the most popular superhero in Marvel comics? The answer is Spider-Man.
Well, one could be 'Which cartoon character has a magic wand?'