There's also Queen of Dorks who tried to sue Gaia for creating the item called Bento Bunny, because she claimed it was stolen from her art even though.. it was a generic riceball rabbit. Her fantards came and Gaia took away the item, then re-released it with a tagline dedicated to her in the description. She was called out on how she draws the same generic anime crap that Gaia has and they should be able to sue her, but she took down a bunch of stuff.
If you know what Pusheen is, she's the creator of him. lol
This was long before Pusheen was made though.