Grixis decks trade resources aggressively, using life as a resource and betting on efficiency
Houndstone Ex Box (Pokemon Promo | Pokemon Cards) prices are based on the historic sales
The card is prominently featured in a movie, which was the first time a Pokmon card was given some kind of canonical storyline and used an inter-media sort of way
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however, the series reached overwhelming popularity due to its style that involved a story concept and detailed hints, adding that the series had a huge impact on other series
While it may be useful to be able to re-arrange the top 6 cards of your deck, this is an easy thing for your opponent to erase with something like Supporter N, add to this the fact Porygon2 has a low HP and a weak attacking move, and there really isn't any reason to use Porygon or Porygon2 in a deck, I would give these two cards a 1 out of 5 rating, look elsewhere