Super Mario Bros. is a platforming game for the Nintendo Entertainment System released in 1985. When Bowser invades the Mushroom Kingdom, it's up to Mario to stop him and save the Princess.

This hack is an direct sequel to Bowser's Crown 1

Story: After Mario defeated Bowser, he accidentally destroyed the fire crown in four pieces. The power of the fire crown spread to four mystery lands, causing chaos in these worlds. The chaos that came out of the fire crown made Mario unconscious. While in that state, Mario saw a mystery character that looked exactly like Bowser. He saw him taking all four parts of the crown. You need to retrieve all parts of the crown.

The main villain of this hack is Bruce, brother of Bowser. He appeared first in SMB2j in levels 8–4 and D–4 before the final fight with Bowser.

World 1 is a prologue that happens right after Mario gets out of Bowser's castle in World 8 from Bowser's Crown 1.

Complete rom hack to Super Mario Bros. that changes:

-All levels,
-Very slightly modified music,
-Graphics,
-Some single gameplay mechanics.

1.1 Fixes single glitches. It also gives question mark blocks with power-up a new graphic, an exclamation mark block. It also makes invisible blocks visible by giving them a new unique graphic.

Important!
If you are using the online patch make sure that you have chosen the version that you want to apply. By default it is set to 1.0

Database match: Super Mario Bros. (World)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922
File CRC32: 3337EC46
ROM SHA-1: FACEE9C577A5262DBE33AC4930BB0B58C8C037F7
ROM CRC32: D445F698