Don't know how to do this one. Sorry. Did you know that you can max your PP to 255?
EDIT 1: In fact, you can't do it yet. I went through every single HEX value and the stats don't seem to change ever.
EDIT 2: Wylfred... Actually I think it's permanent now unless you change it back to normal manually. I went to PC and healed my pokemon and deposited as well and PP (that is maxed to 255) hasn't reverted back yet