Fix object event graphic names (#731)

* Fixed object event graphic names

* Updated files and other variable names

* Fix from finding and replacing without matching case

* spritesheet updates

* Update flag name

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Co-authored-by: Marcus Huderle <huderlem@gmail.com>

data/maps/VictoryRoad_2F/map.json

@@ -17,7 +17,7 @@
   "object_events": [
     {
       "type": "object",
-      "graphics_id": "OBJ_EVENT_GFX_SUPER_NERD",
+      "graphics_id": "OBJ_EVENT_GFX_POKE_MANIAC",
       "x": 7,
       "y": 4,
       "elevation": 3,
@@ -31,7 +31,7 @@
     },
     {
       "type": "object",
-      "graphics_id": "OBJ_EVENT_GFX_BLACKBELT",
+      "graphics_id": "OBJ_EVENT_GFX_BLACK_BELT",
       "x": 20,
       "y": 11,
       "elevation": 4,