BetterPop

Japanese Holon Research Tower Water PSA Population Report

2005 · 24 cards · 1,180 grades counted · data from September 18, 2026

The PSA population report for Japanese Holon Research Tower Water counts 1,180 grades across 24 cards as of September 18, 2026. 414 of those grades are PSA 10s, a set-wide gem rate of 35.1%. 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: Vaporeon EX-Holo (1st Edition) #003, 638 total grades.
  • Fewest PSA 10s: Ditto [Squirtle] #002, 9 PSA 10s out of 42 graded.
  • Hardest to gem: Vaporeon EX-Holo #003, a 21.4% gem rate across 117 grades.
#CardPSA 10PSA 9Total gradedGem rate
001 Staryu1st Edition 7 8 15 n/a
001 Staryu 1 0 1 n/a
002 Ditto [Squirtle]1st Edition 64 84 207 30.9%
002 Ditto [Squirtle] 9 18 42 21.4%
003 Vaporeon EX-Holo1st Edition 224 205 638 35.1%
003 Vaporeon EX-Holo 25 25 117 21.4%
004 Marill1st Edition 11 5 17 n/a
004 Marill 2 1 3 n/a
005 Starmie1st Edition 11 11 28 39.3%
005 Starmie 2 0 3 n/a
006 Azumarill1st Edition 11 13 30 36.7%
006 Azumarill 1 2 3 n/a
007 Eevee1st Edition 28 10 47 59.6%
007 Eevee 9 2 13 n/a
008 Potion1st Edition 0 1 1 n/a
009 Master Ball1st Edition 3 0 3 n/a
009 Master Ball 1 0 1 n/a
010 Holon Scientist1st Edition 3 0 3 n/a
010 Holon Scientist 0 1 1 n/a
011 Water Energy1st Edition 0 1 1 n/a
012 Water Energy1st Edition 1 0 1 n/a
013 Water Energy1st Edition 1 0 1 n/a
014 Water Energy1st Edition 0 1 1 n/a
015 Holon Energy WP1st Edition 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.

Sort and filter every card on this page, with real card scans and prices, in the free BetterPop gallery.

Open the BetterPop gallery