Megaphonez

No. X Y Callz for Where you may acquire them
1 10 29 Springz
Found under the Giant Ice Crystal

.
revealing

.
2 27 22 Spy Gear Partially hidden by a small tree with an enemy Grunt walking around it on (lowered) Green Pyramidz (GP).
3 27 54 GooberStraw Found in plain sight between two Ice Crystalz .
Note: It does not matter which Megaphone you acquire and use first!
In this Custom Level, it is extremely difficult (if not impossible) to use them other than in the intended sequence.
If you find that you have failed to pick up and use a Megaphone, you will have to go back to a previous SAVE (hopefully not all the way back to the beginning) and keep the keeper of the GruntzMachine (Resourcez) on his toez!