High Class Packs (M2A) have a different rarity structure than standard expansions, which is why cross-comparing them needs care
Usually, that is a misprint unless that card is supposed to have it there
The Silver-Bordered Project is supposed to provide clearer guidance for the Magic the Gathering community when making judgement calls about whether or not to include cards in casual games
One of the big announcements from this years Pokmon Presents was a new, mobile Pokmon Trading Card Game, which comes as a big surprise, given Pokmon already has a game where you can collect cards and play online called Pokmon Trading Card Game Live
Basically, its impossible not to see the difference: the fake has a dotted pattern while the real is solid black
The "Blue Back No Number" versions (without number) are considered from the very first print run and are the rarest, per PSA CardFacts historical data