Yep, the ITA XY&Z set have proof, though I can only trade them in Gen 7 since they've been moved up there and can't go back. ): The ENG Korean Tooniverse A-Diglett does have proof as well, but the Masuda's Psyduck, Alva's Gengar, and JPN YotD Shiny Deino all do not.
I'm definitely interested in what you're offering! Let me know what you're thinking after all this information. ^^
Hmm... That means the XY&Z OT is messed up, but... I'll still trade for all of them :)
I have proof for jap flareon, vaporeon, jolteon,umbreon, glaceon, sylveon. Let me know if you need the proof otherwise you're welcome to undo the trade as well.
Let me know the powersaved associated dates as well.
https://www.reddit.com/r/pokemontrades/wiki/hackedevents
Specifically for the 10123 Pokecen Eeveelutions:
10123 Pikachu: February 13, 2014
10123 Eevee: February 1, 2014
10123 Vaporeon: April 20, 2014
10123 Jolteon: November 2, 2013
10123 Flareon: August 1, 2014
10123 Espeon: January 5, 2014
10123 Umbreon: December 26, 2013
10123 Leafeon: July 4, 2014
10123 Glaceon: October 27, 2013
10123 Sylveon: October 20, 2013