diff --git a/emulators/desmume.yml b/emulators/desmume.yml
index d2d28430..9fd3ebc3 100644
--- a/emulators/desmume.yml
+++ b/emulators/desmume.yml
@@ -4,7 +4,7 @@ source: "https://github.com/libretro/desmume"
 profiled_date: "2026-03-18"
 core_version: "SVN"
 display_name: "Nintendo - DS (DeSmuME)"
-cores: [desmume, desmume2015]
+cores: [desmume]
 systems: [nintendo-ds]
 
 notes: |
diff --git a/emulators/desmume2015.yml b/emulators/desmume2015.yml
new file mode 100644
index 00000000..4712afd9
--- /dev/null
+++ b/emulators/desmume2015.yml
@@ -0,0 +1,17 @@
+emulator: DeSmuME 2015
+type: libretro
+source: "https://github.com/libretro/desmume2015"
+profiled_date: "2026-03-19"
+core_version: "SVN (2015 snapshot)"
+display_name: "Nintendo - DS (DeSmuME 2015)"
+cores: [desmume2015]
+systems: [nintendo-ds]
+
+notes: |
+  Frozen 2015 snapshot of DeSmuME. The external BIOS loading feature
+  (desmume_use_external_bios) does NOT exist in this version.
+  The .info declares firmware_count=3 but the code never loads them.
+  Verified: libretro.cpp has no bios7/bios9/firmware path construction.
+  ref: desmume2015/desmume/src/frontend/libretro/libretro.cpp
+
+files: []
diff --git a/emulators/same_cdi.yml b/emulators/same_cdi.yml
index dd78e18d..6f67ea14 100644
--- a/emulators/same_cdi.yml
+++ b/emulators/same_cdi.yml
@@ -1,6 +1,6 @@
 emulator: SAME CDi
 type: libretro
-cores: [same_cdi, cdi2015]
+cores: [same_cdi]
 source: "https://github.com/libretro/same_cdi"
 profiled_date: "2026-03-18"
 core_version: "Git"