Reordering a bit.

Project/scripts/check_genfirst/check_genfirst.gml

@@ -0,0 +1,26 @@
+///gen_checkfirst(pkmn, ignoreBULBASAUR?)
+
+var pkmn = argument0;
+var ignore = argument1;
+
+// Sanity Check
+if (ignore && pkmn=="BULBASAUR")
+    return false;
+
+switch(pkmn)
+{
+    case "BULBASAUR":
+    case "CHIKORITA":
+    case "TREECKO":
+    case "TURTWIG":
+    case "VICTINI":
+    case "CHESPIN":
+    case "ROWLET":
+    case "GROOKEY":
+        return true;
+    break;
+    
+    default:
+        return false;
+    break;
+}

Project/scripts/check_genfirst/check_genfirst.yy

@@ -0,0 +1,8 @@
+{
+    "id": "5d6dc131-402b-45b8-c0ee-331d3e8a9908",
+    "modelName": "GMScript",
+    "mvc": "1.0",
+    "name": "check_genfirst",
+    "IsCompatibility": false,
+    "IsDnD": false
+}