What is the longest name of a cartoon WB?

It's difficult to definitively say which Warner Bros. cartoon has the longest name because there's no official record of this information. However, some potential contenders for the title include:

* "The Night of the Living Dummy Part 2: The Revenge of the Dummy" (Goosebumps) - This title has 12 words, making it a strong contender.

* "The Tickle Monster of Tickletown" (Looney Tunes) - While shorter than the Goosebumps title, this still has 6 words and a unique name structure.

Ultimately, the "longest name" depends on how you measure it (words, characters, etc.) and if you include spin-offs or special episodes.

If you're looking for the longest *running* cartoon show on WB, that would be "The Simpsons," though this show is actually owned by Disney.

If you have any other details, such as the specific year or genre of the cartoon you're looking for, I might be able to give you a more specific answer.