We just have remembered that the Battle Institute is locked off until post game. Good thing we know that the Synchronizer works 100% of the times on the Latis twins. The cutscene is still annoying, though.12 EV's are required to gauge it properly, if the characteristic doesn't say 'Alert to sounds'. (assuming you go Timid) The good thing is Synchronize works 100% of the time provided you keep the Pokemon with it in your party. (perhaps carry no more than 5 Pokemon to speed things up slightly)