>KK creators
That's the thing, he's not creating shit. He's ripping off established characters in ways that are borderline if not actually illegal (using clips of their voices). He's using a bunch of assets people made for a game with a character creator, not making his own models, characters or using a real animation making tool. There's no copyright to defend, it's only the Japanese culture around indie doujin works that keeps this guy from getting sued to oblivion - and that doesn't fully apply, because he's not recouping costs of making physical work like the people that print their own doujins, he's purely making profit off exploiting IP that he has no ownership of, using assets he didn't make and has no right to. KK especially is exploited by clowns, because you can get animation files as well as characters as downloadable cards for free.
It's clown behavior for people like that to be the ones that are loudest about being pirated. It's much more understandable for creators with actual original works to complain.