I know that in melee, SCVs, marines, marauders, ghosts and reapers can enter a bunker (and I assume so can medics, firebats and spectres in the single-player). Can any other unit types enter a bunker? In particular, can any non-Terran unit enter it? (assuming it somehow got under your control in the first place)
And if any other unit can enter a bunker, how much space does it take? Same as with transports?
Any Terran Infantry unit can enter a bunker. Bunkers are restricted to Terran units exclusively, so you’ll have to find another secret place if you want to cuddle zerglings in private.
None of the units in the above picture could join the bunker party.