>>32418653Not him but I'm assuming from what he said, you can do this whenever at whatever level to gain a half level higher than max.
Though he didnt make clear why 3 devices instead of two, unless he meant you could get to 40.5 in which case you could get a pokemon to level 39.5 when you're level 37, however in that instance you'd be forfeiting your opportunity to ger them to 40.
Too bad the easy 3 finger trick doesnt work anymore