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)
I like the harsh white on black, the intricate techno border, and the insane choice of making the card bottom-heavy
In my opinion this is an above average BREAK Pokemon card from the BREAKthrough set
You can see this style of design in Niv-Mizzet Reborn, Korvold, Fae-Cursed King, and Vantress Gargoyle, as well as many classic threats like Thing in the Ice, Deaths Shadow, and all the Theros and Amonkhet gods
Accompanied by a band of heroes, she wanders the seas in a legendary ship, the Pyleas
If you're wondering what Pokemon TCG Pocket is, the clue's in the name