Despite featuring Mario in the title, Mario himself is absent for 95% of the game – hence the name. The game was critically panned for its dull educational content, poor controls, and minimal action. It became a cult classic for all the wrong reasons.

Part 3 implies it’s a series — so episodes 1 and 2 might have set up:

When dealing with .swf files or any downloadable content from the internet:

This is not a mainstream Nintendo production. It is not a ROM hack. It is a piece of —likely dark, satirical, or surreal—that uses Nintendo’s intellectual property to tell a story Nintendo would never authorize. This article will dissect every component of that filename, trace the likely history of the series, and explore why ID 215302 on SWFChan matters to digital preservationists and Mario lore enthusiasts alike.

Peach's Untold Tale [v3.48] [Ivan Aedler] - Internet Archive