Super Mario Bros.: Luigi P1, Mario P2

From the readme: This is a rudimentary patch that swaps Mario and Luigi ingame with accompanying modifications to game text, screens, and HUDs. No changes have been made to the game's mechanics.
...

-Luigi will replace Mario as the first player.
-Mario will replace Luigi as the second player, only being playable in 2-player mode.
-All game text referencing Mario and Luigi has been swapped to correspond to these changes.

This patch functions on all regions and editions of the game, including Duck Hunt versions.

!!!INTENDED FOR SUPER MARIO BROS. ON THE NES!!!
*created by CardiganHill*

INTRODUCTION
============
This is a rudimentary patch that swaps Mario and Luigi ingame with accompanying modifications to game text, screens, and HUDs. No changes have been made to the game's mechanics.

ENCLOSED FILES
==============
This patch comes in two flavors.
~The easiest and least tedious file to use is the luigiedition.ips file. This patches your .NES files directly without needing to punch in individual codes. You will require an IPS patcher to use this file. I'd recommend Lunar IPS, which you may obtain at http://fusoya.eludevisibility.org/lips/
~This patch also comes with a set of 26 Game-Genie-format codes in the gamegeniecodes.txt file. These may be decoded by your emulator, an external website, or Game Genie hardware to apply some or all of the patch. This file is annotated so you can choose which elements of the patch you'd like to apply.

I also included the patch screenshots because why not?

COMPATIBILITY
=============
This patch has been tested on:
-Super Mario Bros. (World) (NTSC)
-Super Mario Bros. + Duck Hunt (USA) (NTSC)
-Super Mario Bros. (Europe) (Rev A) (PAL)
-Super Mario Bros. + Duck Hunt (Europe) (PAL)
This patch works on all editions and regions.

ACKNOWLEDGEMENTS
================
-Shoutout to doppelganger (aka doppelheathen) over at Github for annotating the international Super Mario Bros. ROM
-Shoutout to MrWint at Github for annotating the European Super Mario Bros. ROM

Database match: Super Mario Bros. (World)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922
File CRC32: 3337EC46
ROM SHA-1: FACEE9C577A5262DBE33AC4930BB0B58C8C037F7
ROM CRC32: D445F698


Database match: Super Mario Bros. (Europe) (Rev A)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: AB30029EFEC6CCFC5D65DFDA7FBC6E6489A80805
File CRC32: 7D5FAA58
ROM SHA-1: 0C4992FC08D2278697339D3B48066E7B5F943598
ROM CRC32: 9A2DB086


Database match: Super Mario Bros. + Duck Hunt (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: 663DDEF71CC808C5382A3426EF6D03B5499A51C8
File CRC32: 666EE28E
ROM SHA-1: 36E695BA6CACC8A5098FB67D9C1F8E6828D6C2C6
ROM CRC32: D26EFD78


Database match: Super Mario Bros. + Duck Hunt (Europe)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: D88140962DDAD5B852928E2E3EE88F295456D250
File CRC32: 25B4AE21
ROM SHA-1: 455773982E332BFC30E5CF33CDF5475F2B5E0490
ROM CRC32: 91B4B1D7