the first place to find one of them is that snow barren planet and that guru guy will give you a part for 16 moonstones.the next one is on the planet with the guy who will asemble all the parts to make the hypnomatic parts.you ride the grind rail and when you get to the end a small cutsceene happens and you get a part. the last one is on that planet there holding all the protopets. just go through itand eventually youll find it.

Well just do all missions on the last lvl before u did the snow lvl and then to get the
other piece you have to pay that dude on the yeti lvl (lvl u stuck at where u gotta
control the robots on other side of broken bridge thing) all you do is go get ice crystals
or wutever,it a snow version of the desert one when ur ship got crushed but harder