@papafrankgod They’re Sample cards.
Info about them can be found here: bulbapedia.bulbagarden.net/wiki/Sample_Set_(TCG) (see section Press Conference, March 2001 for info about these Eevee and related Pikachu and Pichu in particular). Also note that those three Sample cards are available in two different versions, when looking at the e-Reader borders. I’m still looking for both the Pikachu myself, which I doubt I’ll find anytime soon. 
Some additional pictures can be found here: www.elitefourum.com/t/pokemon-tcg-picture-dump/17973/1
The first few pictures came from a completed Yahoo Japan auction mid-2016, which sold for about 160,000 Japanese Yen (~1.5k USD). Unfortunately I missed it, since it contains now just those two Pikachu, Pichu, and Eevee, but also loads of other Neo Genesis sample cards (including 10 Pikachus)… 
Greetz,
Quuador