Document Gym scripts first half

src/scrcmd.c

@@ -607,7 +607,7 @@ bool8 ScrCmd_incrementgamestat(struct ScriptContext *ctx)
 
 bool8 ScrCmd_animateflash(struct ScriptContext *ctx)
 {
-    sub_80B009C(ScriptReadByte(ctx));
+    AnimateFlash(ScriptReadByte(ctx));
     ScriptContext1_Stop();
     return TRUE;
 }