yugioh card display case Acrylic for Yu-Gi-Oh! TCG Booster Box 36 Packs — Luna Fabrication Acrylic Card Display Shelf –

All in all, only two cards were banned: Agent of Treachery and Fires of Invention were banned in Standard format and suspended in Historic format

Such fillers are apparently sometimes used in other TCGs (see The Collation Project on the topic of Magic: The Gathering) and are discarded after cutting (though I wouldnt be surprised if there are Jungle packs accidentally containing a blank card out there somewhere)

Despite being technically an Unlimited card, its limited distribution window makes it rarer than most 1st Edition holos in the set

But if your question is, What unofficial, licensed cards first had Pokemon on them? then sure, you can look at non-TCG products like Bandai Carddass

[14] [15] [16] James Whitbrook of Gizmodo characterized the community response as "heated" due to the aftermarket value of the banned cards and their "popularity in competitive play"