Super Mario Bros 3 Rom Hacks

There are many ROM hacks to Super Mario Bros. 3 that genderbend Mario.
Each have their own style and some make gameplay changes while most just change Mario's character to a woman.
Here is a tutorial on how to apply the ROM hack patches

Present Panic - A Princess Adventure
https://www.romhacking.net/hacks/860
Princess Peach and Princess Daisy were taking a quiet vacation away from everything in Snowbite Kingdom. The peace was shattered when Bowser stole all the presents for the holiday from a nearby town! Now Princess Peach and Princess Daisy must make their way across the Kingdom of Snowbite in order to defeat Bowser and return the presents to the village.
Created by Darkdata.


Royal Flush - Princess Sidestory
https://www.romhacking.net/hacks/1633/
Mario Party Board is cursed by one of Bowser’s sons! Defeat him in order to save the day!
Be the Princess, and kick butt!
Created by Darkdata.


Peach & Daisy in The Ultimate Quest (SMB3 PRG0 Hack) (1999) & V2b
This ROM hack not only replaces Mario with Princess Peach, it also contains all new levels.
It can be found in the GoodNES pack.
The last screenshot is from the V2b ROM hack.