This gift was traded to players during a Christmas Celebration.
Players will select Gengar or Scizor, and the a Haunter or Scyther (w/ Metal Coat) is traded to the players,
and it will evolve upon receiving it.
This page also includes a simulated card, for the Haunter and Scyther.
The Christmas Lucky Egg code can also be received at this event.
It appears this trade event had a season 2 due to popular demand.