I am not too sure about the PES editing community or where to get files there, but here is the way I see the process:
Obviously the 2015 Neymar shouldn't have that many arm/neck tattoos
So I guess we can:
1. use F22 Neymar face texture from Dmitri's PC pack with all tattoos and delete some of them, e.g.
go from this
to this
to this
And from this
to this
Then find the best current 2022 Neymar arm tattoo texture and start gradually "deleting" our way back in a similar fashion:
2022
May 2017
August 2016
May 2015
WC 2014
CC 2013
I know this is grown men playing dress up doll house in a video game but alas that's who we are
Also obviously not every tiny detail has to be correct but I think you get the idea.