Here's the plan: You give me the Master Balls (don't worry, I won't run), I clone them (through backing up save files), I give the two master Ball pokemon to you, you give them back, and then I'll return it yet again.
What? I didn't keep it on. I don't even know how to configure that.
Okay, so now I'll trade back your six legends, you'll give me another FC and then I'll trade you again the pokés with the Master Balls.