Found this trick to break the power up limit. It says work 100% on the latest Pokemon update 0. 57.4
Seems you need two phones for double login to do this trick. I wonder how if we use more than 2 phones. Anyone?
Text version source: Gen 2 Pokemon Go Trick: Break Power Up Max Limit (0.57.4) - PcGuidePlus.com
Youtube source: How To Exceed Power Up Limit Pokemon GO - YouTube