diff --git a/packages/scratch-gui/src/lib/legacy-storage.ts b/packages/scratch-gui/src/lib/legacy-storage.ts
index 19882ae5ba5..2203f623257 100644
--- a/packages/scratch-gui/src/lib/legacy-storage.ts
+++ b/packages/scratch-gui/src/lib/legacy-storage.ts
@@ -111,6 +111,16 @@ export class LegacyStorage implements GUIStorage {
             [storage.AssetType.Sound],
             asset => `static/extension-assets/scratch3_music/${asset.assetId}.${asset.dataFormat}`
         );
+
+        // === Smalruby: Start of local sprite assets ===
+        storage.addWebStore(
+            [storage.AssetType.ImageVector, storage.AssetType.ImageBitmap],
+            asset => new URL(
+                `static/smalruby-assets/${asset.assetId}.${asset.dataFormat}`,
+                document.baseURI
+            ).href
+        );
+        // === Smalruby: End of local sprite assets ===
     }
 
     private getProjectGetConfig (projectAsset) {
diff --git a/packages/scratch-gui/src/lib/libraries/costumes.json b/packages/scratch-gui/src/lib/libraries/costumes.json
index 6da69b09363..5f94dea6fea 100644
--- a/packages/scratch-gui/src/lib/libraries/costumes.json
+++ b/packages/scratch-gui/src/lib/libraries/costumes.json
@@ -8960,6 +8960,58 @@
         "rotationCenterX": 77,
         "rotationCenterY": 37
     },
+    {
+        "name": "Shimaraby-a",
+        "tags": [
+            "animals"
+        ],
+        "assetId": "ddaccfcda466a4887299feddc899fea7",
+        "bitmapResolution": 2,
+        "dataFormat": "png",
+        "md5ext": "ddaccfcda466a4887299feddc899fea7.png",
+        "rotationCenterX": 63,
+        "rotationCenterY": 100,
+        "rawURL": "static/smalruby-assets/ddaccfcda466a4887299feddc899fea7.png"
+    },
+    {
+        "name": "Shimaraby-b",
+        "tags": [
+            "animals"
+        ],
+        "assetId": "bd0ff11c925936ed5e0363112103cd0b",
+        "bitmapResolution": 2,
+        "dataFormat": "png",
+        "md5ext": "bd0ff11c925936ed5e0363112103cd0b.png",
+        "rotationCenterX": 63,
+        "rotationCenterY": 100,
+        "rawURL": "static/smalruby-assets/bd0ff11c925936ed5e0363112103cd0b.png"
+    },
+    {
+        "name": "Shimacat-a",
+        "tags": [
+            "animals"
+        ],
+        "assetId": "851e679b8f113ee90e0d686c33fbc940",
+        "bitmapResolution": 2,
+        "dataFormat": "png",
+        "md5ext": "851e679b8f113ee90e0d686c33fbc940.png",
+        "rotationCenterX": 90,
+        "rotationCenterY": 100,
+        "rawURL": "static/smalruby-assets/851e679b8f113ee90e0d686c33fbc940.png"
+    },
+    {
+        "name": "Shimacat-b",
+        "tags": [
+            "animals"
+        ],
+        "assetId": "57613248603bb9c5b4b767b72cd4fdef",
+        "bitmapResolution": 2,
+        "dataFormat": "png",
+        "md5ext": "57613248603bb9c5b4b767b72cd4fdef.png",
+        "rotationCenterX": 90,
+        "rotationCenterY": 100,
+        "rawURL": "static/smalruby-assets/57613248603bb9c5b4b767b72cd4fdef.png"
+    },
     {
         "name": "Shirt-a",
         "tags": [
diff --git a/packages/scratch-gui/src/lib/libraries/sprites.json b/packages/scratch-gui/src/lib/libraries/sprites.json
index 5b0db0451d7..06ea27286c2 100644
--- a/packages/scratch-gui/src/lib/libraries/sprites.json
+++ b/packages/scratch-gui/src/lib/libraries/sprites.json
@@ -11298,6 +11298,90 @@
         ],
         "blocks": {}
     },
+    {
+        "name": "Shimaraby",
+        "tags": [
+            "animals"
+        ],
+        "isStage": false,
+        "variables": {},
+        "costumes": [
+            {
+                "assetId": "ddaccfcda466a4887299feddc899fea7",
+                "name": "Shimaraby-a",
+                "bitmapResolution": 2,
+                "md5ext": "ddaccfcda466a4887299feddc899fea7.png",
+                "dataFormat": "png",
+                "rotationCenterX": 63,
+                "rotationCenterY": 100,
+                "rawURL": "static/smalruby-assets/ddaccfcda466a4887299feddc899fea7.png"
+            },
+            {
+                "assetId": "bd0ff11c925936ed5e0363112103cd0b",
+                "name": "Shimaraby-b",
+                "bitmapResolution": 2,
+                "md5ext": "bd0ff11c925936ed5e0363112103cd0b.png",
+                "dataFormat": "png",
+                "rotationCenterX": 63,
+                "rotationCenterY": 100,
+                "rawURL": "static/smalruby-assets/bd0ff11c925936ed5e0363112103cd0b.png"
+            }
+        ],
+        "sounds": [
+            {
+                "assetId": "3b8236bbb288019d93ae38362e865972",
+                "name": "Chirp",
+                "dataFormat": "wav",
+                "format": "adpcm",
+                "rate": 22050,
+                "sampleCount": 6097,
+                "md5ext": "3b8236bbb288019d93ae38362e865972.wav"
+            }
+        ],
+        "blocks": {}
+    },
+    {
+        "name": "Shimacat",
+        "tags": [
+            "animals"
+        ],
+        "isStage": false,
+        "variables": {},
+        "costumes": [
+            {
+                "assetId": "851e679b8f113ee90e0d686c33fbc940",
+                "name": "Shimacat-a",
+                "bitmapResolution": 2,
+                "md5ext": "851e679b8f113ee90e0d686c33fbc940.png",
+                "dataFormat": "png",
+                "rotationCenterX": 90,
+                "rotationCenterY": 100,
+                "rawURL": "static/smalruby-assets/851e679b8f113ee90e0d686c33fbc940.png"
+            },
+            {
+                "assetId": "57613248603bb9c5b4b767b72cd4fdef",
+                "name": "Shimacat-b",
+                "bitmapResolution": 2,
+                "md5ext": "57613248603bb9c5b4b767b72cd4fdef.png",
+                "dataFormat": "png",
+                "rotationCenterX": 90,
+                "rotationCenterY": 100,
+                "rawURL": "static/smalruby-assets/57613248603bb9c5b4b767b72cd4fdef.png"
+            }
+        ],
+        "sounds": [
+            {
+                "assetId": "83c36d806dc92327b9e7049a565c6bff",
+                "name": "Meow",
+                "dataFormat": "wav",
+                "format": "",
+                "rate": 44100,
+                "sampleCount": 37376,
+                "md5ext": "83c36d806dc92327b9e7049a565c6bff.wav"
+            }
+        ],
+        "blocks": {}
+    },
     {
         "name": "Shirt",
         "tags": [
diff --git a/packages/scratch-gui/static/smalruby-assets/57613248603bb9c5b4b767b72cd4fdef.png b/packages/scratch-gui/static/smalruby-assets/57613248603bb9c5b4b767b72cd4fdef.png
new file mode 100644
index 00000000000..15264eb002b
Binary files /dev/null and b/packages/scratch-gui/static/smalruby-assets/57613248603bb9c5b4b767b72cd4fdef.png differ
diff --git a/packages/scratch-gui/static/smalruby-assets/851e679b8f113ee90e0d686c33fbc940.png b/packages/scratch-gui/static/smalruby-assets/851e679b8f113ee90e0d686c33fbc940.png
new file mode 100644
index 00000000000..18272998941
Binary files /dev/null and b/packages/scratch-gui/static/smalruby-assets/851e679b8f113ee90e0d686c33fbc940.png differ
diff --git a/packages/scratch-gui/static/smalruby-assets/bd0ff11c925936ed5e0363112103cd0b.png b/packages/scratch-gui/static/smalruby-assets/bd0ff11c925936ed5e0363112103cd0b.png
new file mode 100644
index 00000000000..0857db85dba
Binary files /dev/null and b/packages/scratch-gui/static/smalruby-assets/bd0ff11c925936ed5e0363112103cd0b.png differ
diff --git a/packages/scratch-gui/static/smalruby-assets/ddaccfcda466a4887299feddc899fea7.png b/packages/scratch-gui/static/smalruby-assets/ddaccfcda466a4887299feddc899fea7.png
new file mode 100644
index 00000000000..f60da6ef666
Binary files /dev/null and b/packages/scratch-gui/static/smalruby-assets/ddaccfcda466a4887299feddc899fea7.png differ