Because the developer is unknown and it is hosted on various third-party blogs (like Dirakion Games Software Informer

This collection is designed for fans who want a "one-stop shop" for Mario games on their computer without managing multiple individual files. Game Variety:

The argument for video game preservation is valid; without archiving, old media degrades and disappears. However, "Ultra Collection" packages are rarely about preservation. They are often monetized through ad revenue on download sites, meaning a third party is profiting from Nintendo’s IP, which crosses the line from archival to commercial piracy.

When Leo closed the game, the folder vanished from his PC. But the shortcuts remained: 17 little Mario heads on his desktop.

So, why do enthusiasts seek out collections like "Super Mario Ultra Collection 17 En 1"? The answer lies in the appeal of nostalgia and the desire for accessibility. For many, these collections offer a convenient way to experience a multitude of classic games that might otherwise be difficult to obtain or play on modern hardware. Emulation and game collections have become increasingly popular, allowing gamers to relive fond memories and share classic gaming experiences with new generations.

Downloading these collections from untrusted sources carries significant risks: