LogFAQs > #877079521

I've never gotten one here, but yeah that's a scam. If you call the number they'll either try to sell you fraudulent or fake hardware or software, or they'll ask for personal information like names, addresses, emails, passwords, and so on, which of course could be used to open credit cards in your name, steal your identity, etc.

Do a virus and malware scan just to be safe, but for the most part you can ignore those "warnings".
---

https://supermariomakerbookmark.nintendo.net/profile/Q_2580
Mostly traditional stages, the occasional gimmick stage.