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Japanese Master Deck Build Box EX PSA Population Report

2012 · 28 cards · 317 grades counted · data from September 18, 2026

The PSA population report for Japanese Master Deck Build Box EX counts 317 grades across 28 cards as of September 18, 2026. 146 of those grades are PSA 10s, a set-wide gem rate of 46.1%. The table lists every card of this set in GemRate's public PSA population tracking, with PSA 10 and PSA 9 counts, total grades, and per-card gem rate.

  • Most graded: Rayquaza EX #025, 99 total grades.
  • Fewest PSA 10s: Mewtwo EX #014, 19 PSA 10s out of 43 graded.
#CardPSA 10PSA 9Total gradedGem rate
001 Victini 2 1 5 n/a
02 Tepig 2 0 2 n/a
003 Pignite 0 1 1 n/a
004 Emboar 2 1 3 n/a
005 Reshiram 7 7 14 n/a
006 Piplup 6 2 9 n/a
008 Empoleon 1 5 6 n/a
009 Kyurem 1 2 4 n/a
010 Emolga 6 1 7 n/a
012 Eelektrik 1 1 2 n/a
013 Zekrom 6 7 13 n/a
014 Mewtwo EX 19 17 43 44.2%
015 Ralts 2 1 3 n/a
016 Kirlia 4 3 7 n/a
017 Gardevoir 6 4 13 n/a
018 Solosis 1 2 3 n/a
019 Duosion 1 1 2 n/a
020 Reuniclus 1 2 4 n/a
021 Darkrai EX 24 23 54 44.4%
022 Zorua 1 2 4 n/a
023 Zoroark 2 0 3 n/a
024 Zoroark 3 2 6 n/a
025 Rayquaza EX 44 17 99 44.4%
026 Tornadus 2 0 2 n/a
041 N 0 1 2 n/a
043 Bianca 2 0 2 n/a
045 Blend Energy Gfpd 0 1 1 n/a
046 Blend Energy Wlfm 0 1 3 n/a

Gem rate is PSA 10s as a share of total grades, shown only for cards with at least 25 total grades; smaller samples say almost nothing about real gem odds. Source: GemRate public PSA population tracking, refreshed with every BetterPop data pull. Figures on this page regenerate on every site build.

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