The Island Which May or May Not Have Monkeys on It

(Trademark Pending) Island is a hidden island in the Arc region of the Wushanko Isles.

Travel to (Trademark Pending) Island requires finding a Message in a bottle on the beach of Aminishi when wearing a Monkeyspeak amulet or a Cramulet. It's located near Cap'n Ekahi's initial location, his location before you finish Head of the Family. The bottle can be investigated to receive a treasure map.

While carrying the map in the inventory, players can talk to Quartermaster Gully and will be asked if they agree to travel to the uncharted isle.

On the island, players can talk to Swabbie Steve who'll give 1 taijitu. If you speak to him while wearing a M'speak amulet or a Cramulet, he will tell the player he is a pirate, and that The Harbinger sunk his ship, The Barrel.

Transcript
Ook! Oook ooky ook ook!

[...some shakily written human words follow...]

Set sail fer The Island Which May or May Not Have Monkeys on It (trademark pending) and help yerself to a whooping big treasure while yer at it.

-Ook