This Darkrai is part of the year long distribution to commemorate the 20th Anniversary of Pokemon.
It was initially given away as unique Serial Code,
and subsequently redeemable with common Serial Code DARKRAI2016 (EU) and DARKRAI20 (US) .
The dates differ from region to region, between the unique serial code and common password distributions.
US: May 01 to Aug 31, 2016 and Sep 27 to Oct 31, 2016.
EU: May 01 to Aug 31, 2016 and Sep 01 to Sep 30, 2016.
Format Ver.1.0.6-1, Post Updated Date:20180127_0440