Supply chests are crates in the real-world hubs from which you will get Psitanium Nuggets. To open the Supply Chests you will need Supply Chests Key. There is a total of 4 Supply Chests in the Motherlobe Quarry area. This article shows the location of all the supply chest keys and supply chests in the Motherlobe Quarry Area.
Secret Supply Key #1
The supply chest key is located on the upper left side of the Motherlobe. Use the elevator/tube with wind on the left to reach the second level and go around the corner to find this one.
Secret Supply Chest #1
It is located in the Motherlobe area, turn right and look under the balcony. You’ll see it between two pillars at a lower level.
Secret Supply Key #2
The supply chest key is located behind Otto’s Lab on the righthand side.
Secret Supply Chest #2
It is located on top of a big rock near the Otto lab. Use the boat to ride up to the rock and use the vines to climb to the chest.
Secret Supply Key #3
The supply chest key is located inside Otto’s Lab. Head inside till the end. You will find a stair and a fast-moving fan on the left. Use Time Bubble on the fast-moving fan to slow it down. The supply chest key is behind the giant fan.
Secret Supply Chest #3
The Secret Supply Chest is located inside Otto’s Lab. Look up above the fast-moving fan on the left to find a balcony. Follow the path on the left to the upper level, where you can grab this.
Max Turbine (Near Waterfall)
Secret Supply Key #4
The supply chest key is located on a generator right of the waterfall. This waterfall is right from the motherlobe building. Use the boat to ride up to the waterfall.
Secret Supply Chest #4
The Secret Supply Chest is in the treehouse. Use the rail on the right to go up to the platform, then use the stairs. The Supply Chest is located on another wooden platform to the left of the entrance.