Dream's Edge can only be unlocked after you progress through the Penacony Trailblaze Mission. There's a total of 36 treasure chests located in this area.
All Treasure Chests in Penacony (Dream's Edge)
1. Beside the long vent.
2. At the outdoor dining area.
3. At the edge of the building.
4. Defeat the Formidable Foe challenge to unlock the treasure chest.
5. At the edge of the building, just before the vent.
6. Right in front of the space anchor.
7. Defeat the Formidable Foe challenge to unlock the treasure chest.
8. Switch to Hanu using Hanu's Adventure nearby and use Rockets to reach the top of the vents. Be careful of enemies.
9. Drop the box on top of the enemy to stun it so you can get the treasure chest below the vent.
10. Complete the Dream Jigsaw puzzle to unlock the treasure chest.
11. Complete the Dream Ticker puzzle to unlock the treasure chest.
12. Behind the triangle roof on top of the building.
13. Use the Bubble Pinball to reach the south section. The chest can be seen behind the pinball.
14. Complete the Dream Ticker puzzle to unlock the treasure chest.
15. Interact with the trash can and choose the correct option (Option 2 > Option 2). If you choose the wrong one, you will fight the trash can, but will still get the reward once you defeat it.
16. Defeat the Trotter. This is the first Trotter I've seen in Penacony.
17. In between the buildings. Use Dream's Eye to create an illusionary bridge.
18. In between the buildings. Use Dream's Eye to create an illusionary bridge.
19. Complete the Dream Jigsaw puzzle to unlock the treasure chest.
20. At the corner of the main area.
21. Beside the stairs.
22. In between the buildings. Use Dream's Eye to reach across the building.
23. Use the Bubble Pinball to reach the furthest south section. The chest can be seen behind the pinball.
24. In between the buildings. Use Dream's Eye to create an illusionary bridge.
25. Defeat the Formidable Foe challenge to unlock the treasure chest.
26. In between the buildings. Use Dream's Eye to create an illusionary bridge.
27. Beside the stairs.
28. At the farthest southeast area of the map, in front of a vent.
29. In between the buildings. Use Dream's Eye to reach the building.
30. Complete the Dream Ticker puzzle to unlock the chest.
31. Near the space anchor.
32. At the small corner of the building, beside the exhaust fans.
33. At the small corner of the building, near the Stagnant Shadow.
34. In between the buildings. Use Dream's Eye to create an illusionary bridge.
35. Complete the Dream Jigsaw to unlock the treasure chest.
36. Interact with the trash can and choose the correct option (Option 3 > Option 2 > Option 4). If you choose the wrong one, you will fight the trash can, but will still get the reward once you defeat it.