That has a lot to do with how the franchise swept the whole world in Poke Mania and the great marketing through several different venues, ranging from anime to mobile games, and adding more with each installment
Cards are graded for a few key reasons
(Benching either Pokmon ends this effect.) Flip a coin
You usually cant barter or negotiate, since buylist prices are often firm
since your sneaky creature is unblocked, it lets you get the damage trigger
In Pioneer, we can play OG Marwyn, the Nurturer alongside Kami of Whispered Hopes to have eight copies of our key combo piece, which means we should have one in our opening hand in most games, and if the first one dies, the odds of drawing another one aren't that bad