-Communicated with Poseidon in the form of a mermaid princess, as well as knowing two other ancient weapons
-Knows about the Will of D.
-Is connected to the Void Century
-Was friends with Zunesha and possibly all of the minks
-Went to some island to leave treasure behind that can only be accessed by poneglyphs
-Was possibly looked at as a world-changer by Lunarians like King
-Was wished to have been met by Roger
-Was thought by Oden as someone significant enough to open Wano's borders for
Seems like this Joy Boy guy got around quite a bit.