|World(s)||Treasure Trove Cove|
One of the codes for the sandcastle is used to unlock Treasure Trove Cove. However, this makes little sense, as the sandcastle is located within Treasure Trove Cove. Because of this, some players have been led to believe that the Sandcastle was to be originally located in the first world, Mumbo's Mountain, much like the Code Room for Banjo-Tooie was located in the first world, Mayahem Temple.
Also located inside the Sandcastle is the Black Snippet and the Jiggy it is guarding, both of which are trapped behind a gate in the back of the Sandcastle. The player must spell out "BANJOKAZOOIE" to open the gate and collect the Jiggy (fighting the Black Snippet is optional).