What are other invisible units that cannot be seen in the game (even with detectors) like a map revealer. Are there any more?
Seriously, look at the tutorials section and look at cloakable units.
There isn't a section just talking about which units are cloakable in the game, besides re_casper isn't even asking for that. But for units, I can't think of any that you can't see in the game, they are after all units and they should be able to be viewed one way or another.
interceptors and scarabs. those just fade away fast.
Map Revealers, Scarabs and Interceptors, Start Locations, Scanner Sweep Marines (it doesnt actually show a marine, but it shows the scanner sweet. The marine is just to show you where it is placed at), and just about everything else can be seen or detected.
Nothing really to useful. Unless you want to blind your detector usable units will always been seen eventually.
and actually egg which you only see the shadow
and there is a section for disabling units its on my signature and minigameeast's right mini?