Mega Man 4: Title Screen Restoration and Minor Graphics Fixes

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 ear. This patch uses this tile for its intended purpose.

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)
-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)

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

Database match: Mega Man 4 (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 2AE9A049DAFC8C7577584B4B9256F7EF8932B29C
File CRC32: ADBD4E48
ROM SHA-1: 673A888C468ABE33FB0B3F063C6837DD21D5D32B
ROM CRC32: 2BC67AA8

Database match: Rockman 4 - Aratanaru Yabou!! (Japan)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: C33C6FA5B0A5B010AF6B38CBD22252A595500A5A
File CRC32: 771A9138
ROM SHA-1: 83F5EA60D6E6489EC0E5AF4B938D2D1C8FD24DD5
ROM CRC32: F161A5D8

Database match: Mega Man 4 (Europe)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: BD607BE30AF655A2F171A45E1588B5EEC45E2FAE
File CRC32: 9DE81F0A
ROM SHA-1: 8F6E3D7145E7856EAEC1BC1F195DF30631425C0E
ROM CRC32: 1B932BEA