What are some names of cartoon characters that begin with the letter y?

You're right, finding cartoon characters with names starting with "Y" is tricky! Here are some options, though they might not be the most famous:

* Yzma (The Emperor's New Groove) - She's a villain, but a memorable one.

* Yakko (Animaniacs) - One of the Warner brothers, though his name is not exclusively "Y."

* Yogi Bear - You could argue his name starts with "Y," although it's often referred to as just "Yogi."

* Yancy (Recess) - A minor character, but he's there!

* Yumi (Code Lyoko) - A main character in this anime series.

* Yoshi (Super Mario Bros.) - While technically a dinosaur, he's a beloved video game character.

Let me know if you'd like to explore more niche characters or different types of cartoons!