diff --git a/resources/systems/macos/es_systems.xml b/resources/systems/macos/es_systems.xml
index cf3d56680..b35337c9a 100644
--- a/resources/systems/macos/es_systems.xml
+++ b/resources/systems/macos/es_systems.xml
@@ -527,7 +527,7 @@
         <name>gc</name>
         <fullname>Nintendo GameCube</fullname>
         <path>%ROMPATH%/gc</path>
-        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .json .JSON .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
         <command label="Dolphin">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/dolphin_libretro.dylib %ROM%</command>
         <command label="Dolphin (Standalone)">%EMULATOR_DOLPHIN% -b -e %ROM%</command>
         <platform>gc</platform>
@@ -1422,7 +1422,7 @@
         <name>wii</name>
         <fullname>Nintendo Wii</fullname>
         <path>%ROMPATH%/wii</path>
-        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .json .JSON .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
         <command label="Dolphin">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/dolphin_libretro.dylib %ROM%</command>
         <command label="Dolphin (Standalone)">%EMULATOR_DOLPHIN% -b -e %ROM%</command>
         <platform>wii</platform>
diff --git a/resources/systems/unix/es_systems.xml b/resources/systems/unix/es_systems.xml
index 279ca7b61..2aab92973 100644
--- a/resources/systems/unix/es_systems.xml
+++ b/resources/systems/unix/es_systems.xml
@@ -531,7 +531,7 @@
         <name>gc</name>
         <fullname>Nintendo GameCube</fullname>
         <path>%ROMPATH%/gc</path>
-        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .json .JSON .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
         <command label="Dolphin">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/dolphin_libretro.so %ROM%</command>
         <command label="Dolphin (Standalone)">%EMULATOR_DOLPHIN% -b -e %ROM%</command>
         <command label="PrimeHack (Standalone)">%EMULATOR_PRIMEHACK% -b -e %ROM%</command>
@@ -1448,7 +1448,7 @@
         <name>wii</name>
         <fullname>Nintendo Wii</fullname>
         <path>%ROMPATH%/wii</path>
-        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .json .JSON .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
         <command label="Dolphin">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/dolphin_libretro.so %ROM%</command>
         <command label="Dolphin (Standalone)">%EMULATOR_DOLPHIN% -b -e %ROM%</command>
         <command label="PrimeHack (Standalone)">%EMULATOR_PRIMEHACK% -b -e %ROM%</command>
diff --git a/resources/systems/windows/es_systems.xml b/resources/systems/windows/es_systems.xml
index 5181cd85b..e92339127 100644
--- a/resources/systems/windows/es_systems.xml
+++ b/resources/systems/windows/es_systems.xml
@@ -531,7 +531,7 @@
         <name>gc</name>
         <fullname>Nintendo GameCube</fullname>
         <path>%ROMPATH%\gc</path>
-        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .json .JSON .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
         <command label="Dolphin">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\dolphin_libretro.dll %ROM%</command>
         <command label="Dolphin (Standalone)">%EMULATOR_DOLPHIN% -b -e %ROM%</command>
         <platform>gc</platform>
@@ -1446,7 +1446,7 @@
         <name>wii</name>
         <fullname>Nintendo Wii</fullname>
         <path>%ROMPATH%\wii</path>
-        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.gcm .GCM .iso .ISO .wbfs .WBFS .wia .WIA .ciso .CISO .gcz .GCZ .elf .ELF .dol .DOL .dff .DFF .json .JSON .rvz .RVZ .tgc .TGC .wad .WAD .m3u .M3U .7z .7Z .zip .ZIP</extension>
         <command label="Dolphin">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\dolphin_libretro.dll %ROM%</command>
         <command label="Dolphin (Standalone)">%EMULATOR_DOLPHIN% -b -e %ROM%</command>
         <platform>wii</platform>