List of Super Mario Maker pre-release and unused content
From the Super Mario Wiki
This is a list of pre-release and unused content for the game Super Mario Maker.
Originally called Mario Maker, this build of the game was first presented at E3 2014 with a demo that the attendees could play with the following differences compared to the final game:
Game Awards Trailer
During the Game Awards, a trailer for Mario Maker was released. While it was closer to the final game than the E3 2014 build, it was still very different.
Unused costume data
Several unused costumes are referenced in the game's CharaMarioTable.byaml file. None of them have graphics associated with them, however. Note that these names would not have been displayed in-game, as the in-game names are stored in a different file. These text strings are not present in the updated archives in updates 1.01 and above.
Eight of the costumes, that were previously unused in the initial launch version, were later re-added as Event Course costumes and rewards for completing the 100 Mario Challenge in the v1.40 update.
Early Splatoon graphics
In the game's files there are early versions of clothes and weapons from Splatoon.
Unused course element graphics
There are several unused sprites found in the game files. Some sprites of Mario in Super Mario Bros. 3 suggest that ground pounding and wall jumping were originally going to be used in the other styles, outside of the New Super Mario Bros. U style.
Big Mushroom sprites
Unused palette graphics
Several blank images are stored with the regular palette graphics. lyt is short for "layout".
Super Mario Bros. 3
"killer" is the Japanese name for Bullet Bill, suggesting that at one point Bullet Bills could be placed without needing a Bill Blaster.
"killer" is the Japanese name for Bullet Bill, implying that it would have been possible to place them without needing a Bill Blaster.
Possibly the Angry Sun, indicating that it would have needed a new sprite to accommodate the Super Mario World style.
Possibly the Angry Sun.