Here's why:
* Promotional Items: Gold-plated Pokémon cards are typically promotional items, given away as prizes at tournaments or special events. There's no mass production of these cards.
* Limited Production: Even if some gold-plated cards were made for a specific promotion, the number would likely be very limited.
* No Public Disclosure: The Pokémon Company generally doesn't release production numbers for promotional cards.
Therefore, it's impossible to say exactly how many gold-plated Pokémon cards exist.