in the majority of TCGs, these are known as Secret Rare cards, due to their numbering
Choose a creature type you like and build around it
Each AP is signed in black ink on the front and is numbered in the lower right corner of the white back (x/30)
Mog, Moogle Warrior* Little Mog from the Final Fantasy 6 Commander Deck is an interesting Group Hug type of card, that lets everyone loot, and making you little moogles and growing them all up, just like your own little moogle breeding center
Numerous official accessories such as deck boxes, sleeves and binders are also available, though just about any standard sized card sleeve, binder or deck box will do the job just fine
Many decks are built with two types in mind, but finding enough Pokemon to fill only those two types, and synchronize nicely with each other, would be laborious at best