The true number is hard to estimate because most players see only a slice of the card pool at any given time the sets that were legal when they played, the cards their friends owned, and whatever showed up in tournaments they followed
Keep in mind that while requesting high-quality photos can help you detect counterfeit cards, its always best to inspect rare and valuable cards in person (where possible)
A silver Chansey coin was included with the 1996 Pokemon Starter deck
And considering you can create mana and draw cards, it won't be hard to chain creatures together and get all three options
Note that the Treasures enter tapped, so itll be tough to fully combo with this card, but its strong as a value engine in the right environment
For each card knocked off that library, put it into its owners graveyard and Nerf War deals damage to that player