diff --git a/rules.d/core-rules.sh b/rules.d/core-rules.sh
index 72b667417..f38f22fbb 100644
--- a/rules.d/core-rules.sh
+++ b/rules.d/core-rules.sh
@@ -618,6 +618,14 @@ libretro_melonds_name="melonDS"
 libretro_melonds_git_url="https://github.com/libretro/melonDS.git"
 libretro_melonds_build_makefile="Makefile"
 
+include_core_melondsds() {
+register_module core "melondsds"
+}
+libretro_melondsds_name="melonDS DS"
+libretro_melondsds_git_url="https://github.com/JesseTG/melonds-ds"
+libretro_melondsds_build_rule="cmake"
+libretro_melondsds_build_extradir="src/libretro/"
+
 include_core_openlara() {
 register_module core "openlara" -ngc -ps3 -psp1 -qnx -wii
 }
@@ -1644,7 +1652,7 @@ include_core_emuscv() {
 	register_module core "emuscv"
 }
 libretro_emuscv_name="EmuSCV"
-libretro_emuscv_git_url="https://github.com/wzcwzc/emuscv.git"
+libretro_emuscv_git_url="https://gitlab.com/MaaaX-EmuSCV/libretro-emuscv"
 
 include_core_ardens() {
 	register_module core "ardens"
@@ -1726,6 +1734,13 @@ libretro_wasm4_build_args="-DCMAKE_BUILD_TYPE=Release -DLIBRETRO=ON -DCMAKE_POSI
 libretro_wasm4_build_subdir="runtimes/native"
 libretro_wasm4_git_submodules="yes"
 
+include_core_geolith() {
+	register_module core "geolith"
+}
+libretro_geolith_name="Geolith"
+libretro_geolith_git_url="https://github.com/libretro/geolith-libretro.git"
+libretro_geolith_build_subdir="libretro"
+
 # CORE RULE VARIABLES
 #
 # All variables follow the format of libretro_<core>_<setting> where <core> is