I appreciate your detailed query, but I need to clarify what information is actually available to answer it properly.
The search results provided do not contain any information about Wizards of the Coast confirming the number of Shadowless cards printed. The search results discuss error cards in the Pokémon Trading Card Game, the Prerelease Raichu card, Masaki promotional cards, and a Base Set Squirtle listing, but none of these sources address the total production numbers for Shadowless cards or any official confirmation from Wizards of the Coast about how many were manufactured.
Shadowless cards refer to the earliest printings of Pokémon Base Set cards that lack the drop shadow effect around the card border that appeared in later printings. While these are highly sought after by collectors due to their age and rarity, the search results provided do not contain specific data about production quantities or official statements from Wizards of the Coast regarding how many Shadowless cards were actually printed.
To properly answer your question about whether Wizards of the Coast ever confirmed the number of Shadowless cards printed, I would need access to official statements from the company, historical production records, or reliable sources that have documented such confirmations. The current search results do not provide this information.
If you’re interested in learning about Shadowless card production numbers, you might want to consult official Pokémon Company archives, Wizards of the Coast historical documentation, or established Pokémon card collecting communities that may have compiled this information from various sources over the years.
