@Paperchampion23
Idk if you already said this but,
It seems obvious to me that this "treasure" from Hachinosu is not some Devil Fruit, especially not ones that we already know exist.
I think the treasure is something else that ended up being
switched with baby Shanks. The Roger Pirates came out victorious in God Valley, and ended up looting and finding this supposed treasure they were looking for. They set sail, open the box, and to their surprise they've been stuck with baby Shanks.
I'm thinking that, for some reason, the Roger Pirates decided to gang up on Garling. In exchange, he offered them the prized treasure (which he won by being champion of the hunt) for his life. Little did they know, he secretly swapped out the treasure with his own son and kept it to himself.