>Nintendo has finally sued too many smart people, and shut down too many fan projects.

I've always wondered, with Nintendo's history of being rather litigious and forcing fans to take down gameplay videos, etc, how have they not sued Roblox out of existence yet? Practically every game I see my kids play on Roblox makes heavy use of unlicensed Nintendo IP: models/images of Mario, Yoshi, Pikachu, well known music and sound effects from various Nintendo games, and so on. Robolox is not some obscure app, AFAIK it has over 150 million users and rakes in money from these games that are making extensive use of Nintendo's IP. IANAL but this seems like a slam dunk, what gives?