HOLOHAWKUK Pokémon Market Sign in
Home / Sets / Gym Heroes / Brock's Onix
Powered byHoloHawkPriceChartingPulseTCG
Brock's Onix 21

Brock's Onix 21 1st Edition

Gym Heroes · Rare · #21

The 1st Edition printing — a separate card from the standard version.

£16.23

HoloHawk · live UK market

+21.7%1D
+21.7%7D
+21.7%30D
Find this on eBay UK

HoloHawk earns a commission on eBay purchases through this link. It never changes the price you pay.

Prices by grade

PSA 10 = 25.1× raw

Today's figures for every tier.

Raw · ungraded£11.95
Grade 9£44.41
Grade 9.5£48.95
PSA 10£300
BGS 10£391
CGC 10£43.66

A PSA 10 sells for 25.1× the raw card — a gap of £288. Grading fees and the risk of a 9 come out of that.

At a glance

30-day high£16.23
30-day low£13.34
Tracked high£16.23
Days tracked138
IllustratorBenimaru Itoh
Pokédex95

Price history

114 readings · 138d
£16.23+21.7%HoloHawk£11.95+7.1%PriceChartingPulseTCG awaiting data
23 Aug23 Aug27 Aug27 Aug30 Aug30 Aug
£16.23+21.7%HoloHawk£11.95+2.7%PriceChartingPulseTCG awaiting data
31 Jul1 Aug3 Aug11 Aug22 Aug30 Aug
£16.23+21.7%HoloHawk£11.95+7.5%PriceChartingPulseTCG awaiting data
14 Apr8 May3 Jun26 Jun18 Jul30 Aug
Three independent readings on one scale. A reading is recorded only when a price changes, so a flat stretch means it held. Hover for any day. PulseTCG has no readings for this card yet.

Graded price history

PSA 10 · £300
£300+363.2%PSA 10£48.95-1.5%Grade 9.5£44.41-1.2%Grade 9£391+42.0%BGS 10£43.66-1.0%CGC 10
14 Apr8 May3 Jun26 Jun18 Jul30 Aug
Graded prices from PriceCharting, in GBP. PSA 10 has been tracked since April 2026; the other tiers began recording 3 August 2026 and join the chart as their history builds.

New listings per day

0 today

How many new UK listings appear for this card each day. Rising supply against a falling price is the clearest sell signal there is. This counts what we saw, so it is a sample of the market rather than a total.

13 Aug19 Aug26 Aug1 Sept
New UK listings we saw appear each day. A direct count of what the scanner observed, not an estimate of everything on eBay. Source: HoloHawk, observed directly on eBay UK.

Confirmed sales per day

Building
How often this card actually sells We record roughly 4,600 UK auction outcomes a day across the catalogue. This charts how many close with a winning bid, day by day, from the first confirmed sale for this card.

Only auctions that finished with a bid count. A listing vanishing is not proof of a sale, so it is not counted as one.

Recent confirmed sales

Recording live
No confirmed sales for this card yet We log every UK auction that closes with a winning bid — around 4,600 a day across the catalogue. The first result for this card appears here as soon as one sells.

On sale now in the UK

2 live

Fixed-price listings we are currently tracking, cheapest first. Asking prices, not sales, and a sample of what is listed rather than everything on eBay. Each row opens the listing on eBay — HoloHawk earns a commission on purchases made through it, and it never changes the price you pay.

ListingCondition Ask
Pokemon Card Brock's Onix (21) LP Gym Heroes 1st Edition Rare 21Ungraded£27.50
Pokemon Cards: Gym Heroes 1st Edition Rare: Brock's Onix 21/132Ungraded£29.99
Where these numbers come from

Three independent readings, shown side by side rather than blended into one figure:

HoloHawk Our own market price, from live UK listings
PriceCharting Published reference price, USD converted to GBP
PulseTCG Published reference price, natively GBP

A reading is stored only when a price actually changes, so flat stretches mean the price held — not that data is missing. Where a source has no history for an item its line is absent rather than flat. Confirmed sales are UK auctions that closed with a winning bid, observed within three minutes of close, so each is a lower bound. Live listings are asking prices, not sales. Supply and sales counts are direct observations — listings we saw appear and auctions we saw close with a bid. We do not infer that a listing sold because it disappeared, so nothing here depends on that guess.

Also in Gym Heroes

Sabrina's Gengar 14 1st Edition £967
Sabrina's Gengar 14 £208
Erika's Dragonair 4 1st Edition £197
Blaine's Moltres 1 1st Edition £169
Rocket's Scyther 13 1st Edition £129