Here's what we know about it:
* It's on the beach: The arrow is located on the beach near the top of the island.
* It's a stone structure: The arrow itself is made of stone, and it's hard to miss with its distinct arrow shape.
* There's no obvious purpose: While players have theorized about its meaning, there's no official explanation from Game Freak.
Some theories about the arrow include:
* A lost civilization: Some speculate that the arrow might be a relic from a lost civilization that once inhabited the island.
* A navigational marker: It could have served as a marker for sailors, guiding them towards the island.
* A symbolic gesture: It could be a simple symbol representing hope or direction, without any specific practical meaning.
However, without any official confirmation from Game Freak, the true purpose of the arrow remains a mystery.
In Pokemon Emerald and FireRed, Birth Island doesn't exist and therefore doesn't feature this arrow.