1) Beedle’s Shop Ship
Find him in the SW quadrant and hand over 500 rupees.

2) Zauz’s Island
Use a Cucco to hover to the chest just right of Zauz’s house.

3) Isle of Gust
Kill all the miniblins in the pit to reveal a chest.

4) Postbox
Salvatore will send you one after trying his cannon minigame.

5) Isle of Ember, Astrid’s House
Talk to Astrid after beating the Temple of Wind.

6) Molida Island
Dig the obvious spot just past the sun key door. The chest is on the ledge.

7) Temple of Courage
On floor B1, aim an arrow orb north to hit the eye crest and reveal a chest.

8) Mercay Island
There’s a chest on Freedle’s isle.

9) Bannan Island, Old Wayfarer’s Hut
Pass on Jolene’s letter to Joanne.

10) Temple of the Ocean King
Defeat all of the Wizzrobes on floor B9 to reveal a chest.

11) Goron Island, Big goron’s Chamber
Answer all the elder’s questions correctly.

12) Temple of Ice
Use the boomerang to hit the orb on floor 3F’s SW ledge to lower the barrier around the chest.

13) Temple of Ice
Navigate floor B1 with the hookshot to reach the north-east chest.

14) Isle of Frost
Hookshot to the far west ledge.

15) Postbox
A gem is in Aroo’s letter after saving him from the Yook.

16) Temple of the Ocean King
On floor B2, use bombs and bombchu to unblock and navigate the path to the switch.

17) Maze Island
Complete the treasure maze on Beginner difficulty.

18) Maze Island
Bomb the south wall to reveal a path to a chest on the east side of the maze.

19) Isle of Ruins
Lowering water reveals a cave east of the NW pyramid. There’s a chest inside.

20) Isle of Ruins
There’s a chest south of the larger NE pyramid. Move some boulders to reach it.