its easy if you understand it, i written it down some place, but i dont find it so i think you go like this. right, up, left, up, right, right.
There is a planet that's a mixture, But it has lava. BE SURE TO BUY THE WATER TOOL FIRST.:)
You can get the mesaspectrobe on the second planet Diachi, at the boss area after you beat the game. But be careful because they are very hard to pick up when using the drill because it goes to critical really fast. and this only for the first spectrobes game not on spectrobes beyond the portals
After you have beaten Krux you have to go back to his planet (Malik). then go back to the throne room. once you are there, there will be a black orb. then go into it and you will be able to beat the battle sequences and get the......... well maybe i shouldn't tell you
Aldous (the first planet)
On Nox
You get Dark Spectrobes in the ruins of the Lake on Fons, and on its planetary Neighbor Darkmos, and On Krux's Home Planet of Malik.
hyuga
For beyond the portals, Beat the game, go to the planet Malik (which is past Portal 3), go to the throne room, and throw yourself into that sphere of black stuff (you won't die, trust me). But for the original, I'm not sure, so to find out for yourself, I imagine you need to beat the game first, because geos are REALLY powerful stuff, boy howdy.
talk to Cyrus and beat gerebrus in desert
Omicron and Mu are on planet Nessa are 2.
well you get it on either Darkmos or a dark planet, ( i forgot its name )
You get a special key from Kamtoga on the third planet.