All 405 cards are listed, and none of them is reconstructed from a list of names. The counts match the set titles on the card database that holds the Japanese scans: 63 + 64 in March, 92 in July, 96 in October, 90 in December. One thing does not match: the two March half-sets are officially 130 cards (65 + 65), and the source only has 127 (63 + 64). The three missing cards are not invented and not stood in for — the sets are listed as they are, three short of the official count.
The number on the card changes twice this year, and the page shows whichever the card actually prints. March's sets still print a block-wide DPBP#049-style code, and their LV.X, Trainer and Energy cards print no code at all — 28 of them, shown as — unnumbered. From July's Intense Fight onward the card prints 001/092, so the number line reads 048/092: a position, not a code. Both were checked by cropping the bottom-right corner of the scan, not by trusting the database's field.
Every stat comes from the English printing of the same card, because no Japanese database covers the DP or DPt era. HP, type, stage, retreat cost, attacks, ability and illustrator are read off the English twin, and the pairing was checked card by card: name first, then an image fingerprint on the two scans, with a hard cutoff for anything that did not line up. Four cards in the whole year could not be paired: DP6 has two different Drifloon and English printed one; DPt1 has two different Lotad, two Vulpix and two Swablu and English printed one of each. Those four show stats transcribed from the Japanese card face, and their attack names are a plain translation rather than an official one — the cards were never printed in English, so no official name exists.
English was a set behind all year, in both directions. Great Encounters and Majestic Dawn are Japanese cards from October 2007. And the last two Japanese sets of 2008 — Galactic's Conquest and Bonds to the End of Time — did not reach English until February and May 2009, so the English edition page for 2008 does not contain them. The English page covers Great Encounters, Majestic Dawn, Legends Awakened and Stormfront: 458 cards.
The four English sets are not a translation of the five Japanese ones. Legends Awakened merges both March half-sets into one 146-card set; Stormfront takes July's 破空の激闘 but leaves the Shaymin line behind, and those cards turn up in Platinum in 2009. Stormfront also counts to 106 while printing 100: three secret reprints — Charmander, Charmeleon and a Charizard that reproduces the Base Set card — plus three shiny Pokémon numbered SH1–SH3. All six are listed.
Promotional cards are not listed for 2008. The DP-P series, the film's advance ticket promos, Battle Road and league handouts, and the 2008 Championship cards are all real and all absent, because per-card distribution dates and conditions could not be confirmed against a primary source. Nothing is filled in from memory.
About the scans. Card faces are Japanese prints from the card database that holds them. 402 of the 405 are the full-size scans; three exist only as small thumbnails at the source and are left at that size rather than being upscaled or replaced with another card's picture. Where a card has no Japanese name in a public species list — a few alternate forms and the SP cards — the Japanese name is taken from the official species name of the same Pokémon.