Added Following Pokemon mechanics and sprites/palettes for all Gen 1 Pokemon

include/overworld.h

@@ -156,5 +156,6 @@ bool32 Overworld_RecvKeysFromLinkIsRunning(void);
 bool32 Overworld_SendKeysToLinkIsRunning(void);
 bool32 IsSendingKeysOverCable(void);
 void ClearLinkPlayerObjectEvents(void);
+void UpdateFollowerPokemonGraphic(void);
 
 #endif // GUARD_OVERWORLD_H