All 455 cards of the eight Japanese releases are listed, and none of them is reconstructed from a list of names. The counts match the card database that holds the Japanese scans: 20 in January, 55 and 55 in March, 65 and 65 in July, 79 in September, 58 and 58 in December. 45 of them print past the end of their own set and are shown as printed rather than normalised — every one of those is a full-art or shiny secret, and Dragon Selection has none at all.
The Japanese printing is the first-hand source here. Type, HP, retreat cost, illustrator, every attack with its cost and its Japanese text, and the Japanese rules text of every Trainer are read from a Japanese listing of the card. English supplies two things only: the official English card name, and the verdict on whether the English printing is the same card. All 45 Trainers and 5 Special Energy cards were read off the card face for their Japanese names — the listings give the English name and nothing else — which is how the two Blend Energy cards are told apart at all.
The secret cards are filled in from two different places, and every one says which. 28 full-art cards are reprints of a card inside the same pack, so their attacks come from that ordinary printing: Ho-Oh-EX 009 for its full art at 051, and so on through all 24 of them. The 17 shiny cards have no twin in their pack — they are reprints of cards from other sets — so their attacks come from the English Secret Rare printing of the same card, in Dragons Exalted, Boundaries Crossed, Plasma Storm or Plasma Freeze, and each card says where. Four full-art Trainers (Cheren, Bianca, Colress, Professor Juniper) are in the second group, because their ordinary printings are not in the same pack either. No attack on this page is invented, and where nothing exists the field stays empty.
Every one of the 455 cards has an English printing, and only 239 of them are inside 2012. Dragon Selection's twenty go to Dragon Vault in October. March's 110 go to Dragons Exalted in August, all 110 as the same card. July's 130 split 108 to Boundaries Crossed and 22 to Plasma Storm, which is English deciding where the set boundary falls rather than following Japan's. September's 79 and December's 116 wait for Plasma Storm (78 of them) and Plasma Freeze (116) — the seventy-ninth, Plasma Energy, is the one card of Plasma Gale that English put in Boundaries Crossed. The method is name, HP, number of attacks, each attack's damage reduced to its digits, and at least one attack name matching after normalising case and punctuation and HTML entities — without that last step Smack 'n' Slack pairs with nothing.
Two cards are named differently in each language, and the card face settles both. Dragon Selection 020 prints 学習装置 and card databases list it under the old English name EXP.ALL; English calls the same card Exp. Share and reprinted it in Dragon Vault. The two Blend Energy cards print four-type names in Japanese and are listed here by their type initials — WLFM and GFPD — while English prints all four type names out; both printings are the same card, and the pairing follows the card, not the string.
ACE SPEC is confirmed on the card face, not from a database field. Nine cards carry it — Gold Potion and Crystal Wall in Freeze Bolt, Computer Search and Crystal Edge in Cold Flare, Scramble Switch, Dowsing Machine and Victory Piece in Plasma Gale, Rock Guard in Spiral Force, Life Dew in Thunder Knuckle. The mark is a red vertical band down the left edge of the card, and eight other Item cards of the year were checked the same way to be sure the band means what it looks like. No earlier year on this site has one, which is how the debut date is known.
The rarity letters are kept as they print, with one exception stated plainly. Japanese BW cards carry a letter — C, U, R, SR, UR — and there is no RR tier; an R card is holofoil on the face, but the letter is all the card says, so this archive does not convert it to its own Holo Rare category and the eight sets add nothing to the holo figure in the header, which is why that figure is absent rather than zero. Dragon Selection is the exception: all twenty cards sit in one tier that the card database calls Triple Rare, and this page prints that label as it stands instead of inventing C/U/R letters the cards do not carry.
About the scans and what is not here. All 455 card faces are full-size scans, each one shown here scaled down from that original — the smallest is a full 300 pixels across. The BW-P promo series, the league and Battle Road cards, the film tie-ins, the Battle Strength decks and the theme decks sold beside the packs are all real 2012 cards and none is listed, because none has a per-card release date and distribution condition that could be verified. The eight numbered packs are complete — 455 cards, 45 of them secret — and that is the whole claim this page makes.