When Misfit teleports organic matter it has the bad tendency to explode, but inorganic matter doesn't. So what would happen if Misfit tried to teleport with a robot character like the Metal Men, Skeets, Brainiac, ect?

They would be fine, provided they don’t have organic, living tissue. If they were like, say, that Brain guy, the enemy of the Doom Patrol, his body would be fine, his human brain would explode.