What is the suffix for cartoon?

There is no specific suffix for "cartoon". The word "cartoon" itself is the complete word and doesn't typically take suffixes.

However, you might be thinking of related words:

* -toon could be considered a suffix, as in "cartoony" or "animated".

* -ation could be used to form the noun "cartoonization" which means to make something look like a cartoon.

So, while there's no direct suffix for "cartoon," there are some related suffixes that can be used to create words related to the concept of cartoons.