Theyre what R&D refers to as batching mechanics that tie together certain subcategories of cards without adding any additional rules baggage
The creature you use it on generally already has to be fairly impressive for it to be worthwhile, and it wont even always allow you to win combat if your creature isnt big enough
On fakes, this is often, as you have seen here, not the case and you can see that here
Some collectors will do anything to get coveted cards, and this has led to the creation of a very active Pokemon TCG marketplace
Over time, this strategy has evolved, and many similar mechanics have been introduced in Magic: The Gathering
A poor goat that gets passed around from house to house, becoming increasingly tattered