Ah, hello again >:)
Red: Work in progress
White: I forgot what plate. Just activate each plate (air, water, and wind)...
Brown: Totally safe, don't worry. ;)
Green: Caution for the white. Don't use the water plate first if you haven't got the mysterious ring. Use the air plate to be able to swim underwater. (Activating the water plate first will flood the part of it and will make the ring disappear forever).
Above the cave or this dungeon, There's a (?) and you can place the plates there. I Highly recommend taking the mysterious ring first before experimenting with the area. *Sigh* Again, DON'T place a water plate (above the dungeon) or the part of the green part will flood the area and you'll not gonna be able to get the ring. Place the air plate instead to be able to swim there. Thank you~ >.<
That's what I thought. I don't remember much about the junkyard, but I do remember the air is sneaky to get. If I remember correctly, the air plate should be on one of those piles or mountains of junk. It's like how you access the cave/dungeon by pushing the pile. It's in the second part of the junkyard top left near where you access the dungeon.
Idk if this is how I got it, but pushing the pile will open a shortcut so you don't have to keep running around back and forth while avoiding the flying monster insect. :3
Here's the map if you push/remove the pile on the top left. I don't remember if that's where I got the air plate, but it'll give you a shortcut as you can see. The top middle is where you can place plates. Water will flood/fill the room where the ring at, earth will shake the ground, and air will help to swim to get the ring.
If I'm wrong, maybe it's on the other pile of junk. I don't know (forgot) where its located so just explore the second part of the junkyard.
Maybe it's here? I think is this where the other pile is.