At the time of the promotional cards release outside Japan, all Gengar ex cards from which Mega Gengar ex could evolve had been rotated out of legal tournament use
If people are going to use the Historic keyword again, it pays to know what a deck built around something Historic plays, and if those decks are to be bolstered by new printings, it pays to know whats in them
Hokori, Dust Drinker mono white
If youre using the Ship + Sell option, all you have to do is fill out a short form and send in your cards unsorted
Or perhaps the idea for Pokemon TCG Pocket will simply be to fiddle with the rarities and drop rates in the random packs so that there's not enough rare cards around to really compromise the economy - after all, who'd trade away their only shiny Charizard if there's no real chance they'd get another one
Just be honest about what's included