do all first edition pokemon cards say first edition 1st - Old - 100% Vintage - WOTC ONLY - 10 card Gen 1 & 2 Pokemon Cards - First GEN

"Pokmon TCG Japan's Shiny Treasure Ex: Shiny Paldean Wooper"

The question if it was ever intended to be included in packs is not completely clear, but the discovery of E4 member styluspt that the cards was actually advertised to be in the set in a Japanese Trainers Magazine as well as on early concept designs of Jungle booster packs certainly makes this appear likely (see PIKACHU 1ST ED JUNGLE BLACK STAR PROMO - WAS IT INTENTIONAL

But recontextualized, I see it becoming a third Exsanguinate for a mill deck, when combined with the previous two cards

The Command Zone (Commander Format) The command zone exists only in specific formats