GameSettings: Add patches for Pokémon Colosseum and Pokémon XD to circumvent the check that the save being overwritten matches the last known save.

Data/Sys/GameSettings/GC6E01.ini

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+# GC6E01 - Pokémon Colosseum
+
+[OnFrame]
+# This game has extra memory card checks compared to most games,
+# presumably to prevent Pokémon duping. These can interfere with
+# saving your game when using savestates.
+#
+# 0x801cfc2c:
+# Originally a branch that checks if the save counter in memory
+# matches the one on the memory card. We patch this to instead
+# overwrite the counter in memory with the one from the memory
+# card. We need to do this because each memory card file actually
+# contains three save slots the game rotates when saving, and
+# when loading it loads the save with the biggest save counter.
+# So we need to make sure the newly written save (which uses
+# the value from memory + 1) is higher than any save currently
+# on the card.
+#
+# 0x801cfc7c:
+# Another branch. Not entirely sure what this one checks, but
+# not patching this one sometimes still makes it recognize the
+# memory card as 'not the same Memory Card as the one used to
+# load the saved data', so nop it out.
+#
+$Allow Memory Card saving with Savestates
+0x801cfc2c:dword:0x9005002c
+0x801cfc7c:dword:0x60000000

Data/Sys/GameSettings/GC6J01.ini

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+# GC6J01 - ポケモンコロシアム
+
+[OnFrame]
+# This game has extra memory card checks compared to most games,
+# presumably to prevent Pokémon duping. These can interfere with
+# saving your game when using savestates.
+#
+# 0x801cb5b8:
+# Originally a branch that checks if the save counter in memory
+# matches the one on the memory card. We patch this to instead
+# overwrite the counter in memory with the one from the memory
+# card. We need to do this because each memory card file actually
+# contains three save slots the game rotates when saving, and
+# when loading it loads the save with the biggest save counter.
+# So we need to make sure the newly written save (which uses
+# the value from memory + 1) is higher than any save currently
+# on the card.
+#
+# 0x801cb608:
+# Another branch. Not entirely sure what this one checks, but
+# not patching this one sometimes still makes it recognize the
+# memory card as 'not the same Memory Card as the one used to
+# load the saved data', so nop it out.
+#
+$Allow Memory Card saving with Savestates
+0x801cb5b8:dword:0x9005002c
+0x801cb608:dword:0x60000000

Data/Sys/GameSettings/GC6P01.ini

@@ -0,0 +1,27 @@
+# GC6P01 - Pokémon Colosseum
+
+[OnFrame]
+# This game has extra memory card checks compared to most games,
+# presumably to prevent Pokémon duping. These can interfere with
+# saving your game when using savestates.
+#
+# 0x801d429c:
+# Originally a branch that checks if the save counter in memory
+# matches the one on the memory card. We patch this to instead
+# overwrite the counter in memory with the one from the memory
+# card. We need to do this because each memory card file actually
+# contains three save slots the game rotates when saving, and
+# when loading it loads the save with the biggest save counter.
+# So we need to make sure the newly written save (which uses
+# the value from memory + 1) is higher than any save currently
+# on the card.
+#
+# 0x801d42ec:
+# Another branch. Not entirely sure what this one checks, but
+# not patching this one sometimes still makes it recognize the
+# memory card as 'not the same Memory Card as the one used to
+# load the saved data', so nop it out.
+#
+$Allow Memory Card saving with Savestates
+0x801d429c:dword:0x9005002c
+0x801d42ec:dword:0x60000000

Data/Sys/GameSettings/GXXE01.ini

@@ -0,0 +1,7 @@
+# GXXE01 - Pokémon XD: Gale of Darkness
+
+[OnFrame]
+# Very similar to Pokémon Colosseum's save check, see those files for details.
+$Allow Memory Card saving with Savestates
+0x801cc304:dword:0x90e5002c
+0x801cc4b0:dword:0x60000000

Data/Sys/GameSettings/GXXJ01.ini

@@ -0,0 +1,7 @@
+# GXXJ01 - ポケモンＸＤ 闇の旋風ダーク・ルギア
+
+[OnFrame]
+# Very similar to Pokémon Colosseum's save check, see those files for details.
+$Allow Memory Card saving with Savestates
+0x801c7984:dword:0x90e5002c
+0x801c7b30:dword:0x60000000

Data/Sys/GameSettings/GXXP01.ini

@@ -0,0 +1,7 @@
+# GXXP01 - Pokémon XD: Gale of Darkness
+
+[OnFrame]
+# Very similar to Pokémon Colosseum's save check, see those files for details.
+$Allow Memory Card saving with Savestates
+0x801cd764:dword:0x90e5002c
+0x801cd910:dword:0x60000000