The lawsuit claims that RomUniverse is "built largely on brazen and mass scale infringement of Nintendo's intellectual property rights," and charges the defendants with copyright infringement, federal trademark infringement, and unfair competition. "According to the Website [RomUniverse], as of the date of filing this Complaint, hundreds of thousands of copies of Nintendo games have been illegally downloaded through the Website including nearly 300,000 downloads of copies of pirated Nintendo Switch games and more than 500,000 copies of pirated Nintendo 3DS games," reads the lawsuit.