>>43357356You weren't supposed to see it at all. It doesn't count as an Easter Egg. If you were supposed to see it and they made it inaccessible, it counts as an accident.
In any case, it looks like it belongs at the Safari Zone, and because it was in Map 12 in the early map, we can conclude that map 12 was the early Safari Zone entrance. IT EVEN MATCHES THE LOCATION RELATIVE TO FUCHSIA IN THE FINAL GAME:
>Location: North of Fuchsia City(Also, Helix Chamber claims this map is "disappointing", which means is it very interesting.)