Mega Man 4 Title Screen Restoration and Minor Graphics Fixes v1.1
LiquidMarble
These contents may be used for any purpose, with no permission or credit needed.

Changelog:
v1.1 November 17, 2022
-Made compatible with Korxtendo's Mega Man 4 Japanese Style Title Screen hack thanks to Pethronos
-Added separate patches for each change
-Added PAL version support
v1.0 January 8, 2021
-Initial release

Description:
The Japanese version of Mega Man 4 has an unused tile in the title screen graphics that perfectly fits into the black space at the bottom corner of the helmet's earpiece. This patch uses this tile for its intended purpose.
Restoring it in the Japanese version is a one-byte fix:
621A0: 00->F6
The tile is only in the Japanese ROM (28F70-28F7F), so the US/European patch imports it over a blank tile (284A0-284AF). After that, a similar fix can be used:
6219D: 00->49

This patch also fixes some probable mistakes and regressions from previous games:
-Correct Roll's face palette when the screen turns sepia (part of her skin was eye-colored)
 36AB8 (USA, Japan)/36AC0 (Europe): 36->27 (cream to orange)
-For the ending, add a pixel of hair by Mega Man's neck (match Mega Man 2)
-For Mega Man's run sprites, add back part of his shoulder and layer his face so it is under his arm (match Mega Man 1 and 2)
-Fix Rush's menu animation so his back leg bends instead of using a duplicate tile of his standing leg (match Mega Man 3)

There is an all-in-one patch as well as separate patches if you only want one or some of the changes.
Apply the correct patch(es) for your ROM's region.

Utilities used:
Capcom Sprite Assembler by Matrixz
HxD by Maël Hörz
YY-CHR by YY
FCEUX