No need to. But anything too succesful should be ready to be brought down any moment.

pokemon showdown is insanely and I mean insanely successful but it seems to have been almost blessed by the pokemon company.

I genuinely don't know how its legal, when I shared the link to pokemon showdown to one of my friends, his first thoughts was, wait how is this legal? This is such a good thing, I wonder why this is free. Only for me to tell it its open source and bro was flabbergasted to say the least.