I wondered if this would be about PokeMMO, which I've recently started playing. Basically, they made a commercial Pokemon game by gluing the first five ROMS together, and they get around intellectual property by making players supply their own ROMs (which they assume you've acquired legally) for copyrighted assets.

It's incredibly fun. I'm pricklypears2 if anyone wants to play together. And if the devs read this, please add Mimikyu somehow I beg you <3