This is because Shadowless cards are the first version of Base Set - The original set released in English in 1999
If the Lycanroc-GX is never Knocked Out, it can use Claw Slash on two Zoroark-GX to take four Prizes, then Dangerous Rogue GX any of the opponent's Pokemon-GX to win the game
Last but not least, you can also play effects that prevent extra card draw (like Narset, Parter of Veils) or that punish card draw (like Sheoldred, the Apocalypse)
It turns out, the answer is yes
You were probably subconsciously influenced by Cosmic Encounter
So eventually, many, many booster packs from Lightning Clubs Nicholas and Brandon later, we finally have the required Pidgeys and Pu-Pu, and Im sufficiently annoyed by this epic time waster that I cant be bothered to describe in close detail just how efficiently we dismantled these guys with Fighting and Lightning types (even though their staples Snorlax, Kangaskhan and Chansey gave them considerable bulk!)