Trivia / Mario Forever

• Dummied Out: There are some unused levels in the game, along with some unused frames. They can only be accessed by modifying the mafosav.ini file^note The file that is normally used to save the player's progress.
  • Great Journey, a fanmade world added in v7.02, made by LuigiMann and Hagalta, normally has 9 levels, but only 5 can be normally played because of a bug at the first castle cutscene after completing the fifth level that softlocks the game. The remaining 4 levels can only be accessed by modifying the aforementioned mafosav.ini file.
  • There's an unused World 8 map frame that is placed before the levels of the Hardcore Worlds, suggesting that the Hardcore Worlds were supposed to have a map, before being scrapped. The aforementioned unused map frame was removed in v5.9, leaving only a blank white background.
  • Version 7.02 features an unused copy of 1-3 with a completely different level design. According to Michał Gdaniec, the game's developer, this was intended to be one of the levels for "Frustration World" that ended up being unfinished, an instead sends you to the "Goomba Party" level after taking a pipe at the end. Interestingly, this level is actually accessible, since beating World of Stupidity brings you to this level, but a bug with the check points causes you to get stuck in an instant Game Over after starting in the third part of it prevents you from accessing it. This bug can be however avoided by not touching the check points.
• Keep Circulating the Tapes:
  • There are three versions of the game that are unavailable and are considered lost. These versions are 1.15, 1.16, and 4. While versions 1.15 and 1.16 are well known among the game's community, version 4 is not very well known, with some even thinking that this version doesn't exist, given the fact that v4.0 proved to be more popular than version 4.
• What Could Have Been: On November 16, 2017, the game's developer, Michał Gdaniec, has posted the graphics and, what he calls the history of his first steps in game development, the very first known version of Mario Forever, notably started in the 90s. This version was called as Mario Forever 1996, made on the Amiga 1200. Notably, the artstyle of the sprites is much grittier than the ones in the final game, which uses sprites ripped from Super Mario All-Stars. Because of being made all the way back in 1996, this version is lost, along with the developer's other games made with the Amiga 1200. Some more information about them, including the 1996 version of Mario Forever, can be viewed on the developer's website.