Ok, my question is:

If my opponent attacks me with a Stealth figure and turns OFF his Stealth to Perplex possibly PC or whatever, then is his Stealth turned off entirely until the beginning of his NEXT turn? Or at the end of his turn, does his Stealth turn back on, leaving him once again hidden and unable for me to attack him at a range? I ask because in a tourney I had yesterday, my opponent's Black Tom Cassidy shot my Rampaging Hulk and he turned off his Stealth so he could use his SR Scarlet Witch's PC in case he missed. He hit, and then next turn when I attacked Black Tom from a range with my High Evolutionary, he said I couldn't because his Stealth automatically turned back on at the end of his turn, thereby returning him to his cover. It sounded a bit suspicious to me, but I wasn't in an arguing mood so I let it go (he's also a judge so I figured he was right). I ended up losing badly, but that part of the match just got me thinking (it had no effect on the outcome, so I wasn't too phased).

Can anyone help me out with this?

Yes, any team abilities or powers you choose to turn off will come back at the end of that turn.

So everything that happened was correct.

Keeping a copy of the rule book handy is very helpful.

So when attacking and attempting to Perplex a Stealthed character, or if you wanna possibly PC them, do you still have to announce that you are turning off Stealth to do so?

Yes, you do.

i love how you can ask questions and get honest answers on here. this is the best site for clix, period.

Well I gotta second this statement