And by "potentially billions", I mean "$150,000 for each case of copyright infringement found on the sites as well as up to $2 million for each infringement of one of its trademarks. Nintendo also seeks “compensatory damages” and an award to cover its legal fees."
This is honestly kind of just a dick move on Nintendo's part. Sure they have "the rights" to protect their business, but these are ROMs. They're incredibly old, classic, minuscule files that should not cost more than, say, 3 dollars, and Nintendo is suing for up to $150,000 for each one. Imagine having to pay that much money just to play Balloon Fight on your 3DS. It's absolutely not worth it, and this just feels like obscene greed.