Brock's Onix
Gym Heroes · #21/132 · Rare
70
Pokémon
Benimaru Itoh
Market Prices
View on TCGPlayerUpdated: 5/19/2026
1st Edition
$8.66
$26.49
$210.33
$12.72
unlimited
$6.11
$7.90
$67.40
$8.29
Market Signals
Raw NM
$6.99
PriceCharting Ungraded
PSA 10
$121.50
17.4× raw
CGC 10
—
TAG 10
—
PSA Population
116 total
22 at 10
Gem rate 19.0%
TAG Population
66 total
6 at 10
Per-grade ladder
White = real market price. Blue = estimate (no real sale for that grade) — hover for how it was derived.
PSA
PSA 10
$121.50
Real prices from PriceCharting's per-grade table — its generic “Grade N” reflects PSA-graded sales. CGC / BGS / TAG sub-10 grades are estimated from this card's real PSA price at that grade × that grader's 10-to-PSA-10 ratio (this card's own real pair when available, else a ratio calibrated from real catalog cards in the same era and rarity). Grades with no real anchor and low-confidence estimates are omitted — a blank beats a bad number.
PSA 10 is running hot
+70%
This card's PSA 10 sells at 17.4× raw. Typical for Rare in Vintage (pre-2003) is 10.2× (across 79 indexed cards).
Grading ROI (PSA)
Value · $25.99Realistic
$-4.27
using gem rate
If it 10s
$88.52
upside cap
Break-even
23%
gem rate needed
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Discovery Scores
Percentile-ranked 0–100 across the whole catalog. See this card in Rankings →
Scored 16 hours ago
Price History
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Card details — attacks, stats, Pokédex, evolution
Attacks
Flip a coin. If heads, the Defending Pokémon is now Paralyzed.
If your opponent has any Benched Pokémon, choose up to 2 of them. This attack does 20 damage to each of them. (Don't apply Weakness and Resistance for Benched Pokémon.) Brock's Onix can't attack during your next turn.
Weakness
Grass ×2
Resistance
None
Retreat Cost
Pokédex Data
#95
Rock Snake Pokémon
8.8m
210.0kg
"As it grows, the stone portions of its body harden to become similar to a diamond, but colored black."
Evolution Chain
onix
steelix