it is pretty rare I heard Pokemon card companies only make so many
yes
Its the ancient mew holofoil promo card u could get it at pokecorner.com
Yes and no. Some people say it is rare, others don't, but in true fact it is as rare as Articuno or Zapdos or Mewtwo and so on and so forth.
No they are not. I have been collecting Pokemon cards for almost my whole life and majority of the cards are trainer cards.