Dokapon Journey Easter eggs

Hidden Item Shop
In the southwest, the city of Prin is on an island surrounded by poison swamp. It loos like only Prin is there but if you view the far east side of the island you will see a special item shop.This shop sells:

1-gem
2-gem
3-gem
4-gem
5-gem
6-gem
4-spin
5-spin
(0.0381/d/www3)