Mario's Time Machine is an educational title developed by Radical Entertainment that was released for MS-DOS and SNES in 1993; it was later released for the NES in June, 1994 alternatively spelled Mario's Time Machine! It is the successor of Mario is Missing! It is meant to teach younger players basic world history and was the last game in the Mario Discovery series before the brand's discontinuation. The original PC release was distributed through floppy disks, but there was a Deluxe version provided as a CD-ROM in 1994 which added voice acting and a Library reference file featuring Bowser's mother.

The SNES version has a few changes to the original game. There is less content overall, so Mario travels to fewer time periods, and there are some graphical changes such as the design of the time machine. During the sequence on time's waves, Mario can move in all directions rather than just forward due to the use of Mode 7 on the water, and he must go in a whirlpool after collecting ten mushrooms. The true ending is similar to the DOS version, only Bowser's puddle remains on the ground throughout the entire credits, and in addition, Bowser only gapes upon noticing the T-Rex foot coming down on him.

The above text is from the Super Mario Wiki and is available under a Creative Commons license. Attribution must be provided through a list of authors or a link back to the original article. Source: https://www.mariowiki.com/Mario's_Time_Machine