Super Mario Bros. 3 is an action platformer game for the Nintendo Entertainment System.

This ROM hack is endorsed by Kazufox, original creator of the SMB Crowned ROM hacks.

This is SMB3 Japan: Crowned Edition. It may seem like a carbon copy of the original version, but here are some differences:
-The Nintendo logo is unchanged.
-Instead of replacing Mushrooms, Super Crowns replace the orbs that drop when you defeat Boom Boom.
-The text is slightly more straightforward in most scenarios.
-The ending is different...

If you wonder why the author decided to do the Japanese version, the main reason why is because in the original ROM hacks, he didn't like the endings, so he asked permission from Kazufox to make his own versions on the Japanese versions of the games.
It's also to give the players a challenge since the Japanese version may be slightly harder. (Like in SMB3, where Japan shrinks Mario down upon damage, but in the US, it simply makes him turn back into Super Mario.

Rejected Concepts:
-Leaving map elements & title screen unchanged to make it seem like a normal SMB3 game at first.
-Leaving Toads in Toad Houses unchanged for "variety". (Originally a mistake)
-Adding a Kuribo's Shoe in World 7-7
-Adding the Frog Suit to World 7-4
-Adding the unused levels as secret areas

Original ROM Hack by Kazufox: https://www.romhacking.net/hacks/4296/

Database match: Super Mario Bros. 3 (Japan)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: FE31A28747227FC8F2DD25BC72697B48ADC13664
File CRC32: C2CAD43D
ROM SHA-1: EC90C560A5CE5C0CF7FCBE9C6AF422540F8BE10E
ROM CRC32: E7DDFEE3