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Ranked by ungraded value · updated Nov 12, 2026

The Most Expensive Onix Cards

All 31 English Onix cards, ranked by current ungraded value. The top three today are Onix 3/18 ($68.40), Brock's Onix 21/132 ($9.97) and Onix 9/12 ($9.29).

Every Onix card, including the cheaper ones, is on the Onix card prices page. The top card comes from Southern Islands. Across all Pokémon, see the most valuable Pokémon cards.

Ranked
31 English cards
Order
Ungraded value, high to low
Condition
Ungraded

The top 3

  1. #1

    Onix

    Southern Islands · 3/18

    $68.40

    PSA 10 $950

  2. #2

    Brock's Onix

    Gym Heroes · 21/132

    $9.97

    PSA 10 $238

  3. #3

    Onix

    McDonald's Collection 2019 · 9/12

    $9.29

    PSA 10 $58.32

The top 31, ungraded

Sort by

The Most Expensive Onix Cards, sorted by default.

  1. 1

    Onix

    Wizards of the CoastSouthern Islands3/182001

    $68.40

    Ungraded

    PSA 10 $950

    Onix rises from a grassy island in this bright, storybook scene, with a Dragonite gliding overhead, Ho-Oh's golden wing sweeping in from the left, and a small Venonat peeking up from the rocks below. Art by Keiko Fukuyama, it is one of the Southern Islands cards whose backgrounds join into a larger panorama, so collectors chase it to complete that connected island picture.

  2. 2

    Brock's Onix

    Wizards of the CoastGym Heroes21/1322000Rare

    $9.97

    Ungraded

    PSA 10 $238

    Brock's Onix gets the early CG treatment from art by Benimaru Itoh: a blocky gray rock serpent bursting out of a rust-colored rock face against a starry black backdrop, wrapped in crackling green energy with boulders flying loose. The Gym Heroes owner-card concept, with Brock's portrait badge in the corner, gives it real charm, and the non-holo Rare appeals to fans of Brock and the Gym series alike.

  3. 3

    Onix

    Sun & MoonMcDonald's Collection 20199/122019

    $9.29

    Ungraded

    PSA 10 $58.32

    Onix lies coiled low across the frame, its boulder-segmented body curling back into the distance while its craggy face stares out with a narrow, wary glare. The pink cracked-ice holo foil washes over the whole scene, giving the rocky snake a warm sheen. Art by Mitsuhiro Arita gives this McDonald's Collection 2019 promo extra pull for fans of his classic-era work and of the original rock serpent.

  4. 4

    Onix

    Scarlet & VioletPokémon TCG Classic - Venusaur10/342023

    $8.99

    Ungraded

    PSA 10 $50.99

    Onix tunnels through a cross-section of earth here, its gray boulder body snaking diagonally across bands of pink, yellow and blue soil dotted with little Diglett faces peeking up. The art by Tomokazu Komiya has that crayon-textured, folk-art feel his fans love. As a reprint from the Venusaur deck of Pokémon TCG Classic, it draws collectors chasing complete Classic sets and Komiya's playful style.

  5. 5

    Onix

    Wizards of the CoastAquapolis98/1472003Common

    $8.22

    Ungraded

    PSA 10 $74.40

    Onix rears up against a glowing orange sunset in this Aquapolis common, its rocky body lit from behind while a soft lens flare drifts across its coils and rolling hills fade into warm haze. Art by Hajime Kusajima gives it a painterly, almost cinematic feel. Collectors chasing the E-Card series appreciate these atmospheric commons, which are harder to find in clean condition than their rarity suggests.

  6. 6

    Onix-GX

    Sun & MoonHidden Fates36/682019Rare Holo GX

    $2.96

    Ungraded

    PSA 10 $82.99

    Onix-GX swaps the usual drawn style for a rendered, almost cinematic look, with the rocky serpent lunging toward you, jaw wide open, inside a stadium with empty red seats behind it. Art by Planeta Igarashi gives the stone body real weight and texture. Hidden Fates is a heavily collected set, and this holo GX appeals to fans who like Onix and the realistic movie-style artwork.

  7. 7

    Onix

    EXFireRed & LeafGreen42/1122004Uncommon

    $2.81

    Ungraded

    Onix coils its boulder body around the frame here, jaws wide open in a roar as loose rocks tumble through a dusty canyon of jagged orange spires. Art by Kouki Saitou, the scene feels heavy and close, with the rocky segments filling nearly every corner. It's an Uncommon from FireRed & LeafGreen, a set fans of the Kanto remakes and the EX series chase for set completion.

  8. 8

    Brock's Onix

    Wizards of the CoastGym Heroes69/1322000Common

    $1.47

    Ungraded

    PSA 10 $199

    Brock's Onix shows the rock snake rearing up with its jaws wide open, its boulder-chain body curling back across a hazy pink and violet backdrop in a soft painted style, art by Ken Sugimori. As a Common from Gym Heroes, it appeals to fans of Brock and his gym, and the trainer's portrait badge in the corner gives it that distinct Gym series charm collectors enjoy completing.

  9. 9

    Onix

    Wizards of the CoastNeo Genesis69/1112000Common

    $1.32

    Ungraded

    PSA 10 $70.00

    Onix fills the frame here, coiled low inside a dark red cavern with its narrowed white eyes staring straight out at you and its horn rising against the jagged rock behind it. Art by Mitsuhiro Arita gives the scene a moody, painterly glow that feels more atmospheric than most commons. Collectors chasing a complete Neo Genesis set or fans of the original rock snake pick this one up for that brooding cave artwork.

  10. 10

    Onix

    EXSandstorm71/1002003Common

    $1.18

    Ungraded

  11. 11

    Onix

    Wizards of the CoastBase Set56/1021999Common

    $1.17

    Ungraded

    PSA 10 $161

  12. 12

    Onix

    EXTeam Rocket Returns69/1092004Common

    $1.09

    Ungraded

    PSA 10 $123

  13. 13

    Onix

    Wizards of the CoastBase Set 284/1302000Common

    $1.00

    Ungraded

  14. 14

    Onix

    EXUnseen Forces65/1152005Common

    $0.91

    Ungraded

    PSA 10 $55.00

  15. 15

    Onix

    HeartGold & SoulSilverHS—Unleashed56/952010Common

    $0.78

    Ungraded

  16. 16

    Onix

    Black & WhitePlasma Freeze61/1162013Uncommon

    $0.67

    Ungraded

    PSA 10 $43.24

  17. 17

    Onix

    Wizards of the CoastLegendary Collection84/1102002Common

    $0.58

    Ungraded

    PSA 10 $39.60

  18. 18

    Onix

    Diamond & PearlDiamond & Pearl92/1302007Common

    $0.45

    Ungraded

    PSA 10 $48.06

  19. 19

    Onix

    Diamond & PearlStormfront69/1002008Common

    $0.41

    Ungraded

    PSA 10 $40.57

  20. 20

    Onix

    HeartGold & SoulSilverHS—Unleashed57/952010Common

    $0.36

    Ungraded

    PSA 10 $44.38

  21. 21

    Onix

    Sun & MoonLost Thunder109/2142018Common

    $0.35

    Ungraded

    PSA 10 $34.96

  22. 22

    Onix

    Scarlet & Violet15195/1652023Uncommon

    $0.27

    Ungraded

    PSA 10 $32.74

  23. 23

    Onix

    Sun & MoonCelestial Storm71/1682018Common

    $0.27

    Ungraded

    PSA 10 $31.81

  24. 24

    Onix

    Sun & MoonCosmic Eclipse105/2362019Common

    $0.26

    Ungraded

    PSA 10 $31.77

  25. 25

    Onix

    Sun & MoonUnified Minds103/2362019Common

    $0.20

    Ungraded

    PSA 10 $32.53

  26. 26

    Onix

    Sword & ShieldFusion Strike138/2642021Common

    $0.19

    Ungraded

    PSA 10 $31.80

  27. 27

    Onix

    XYEvolutions61/1082016Common

    $0.19

    Ungraded

  28. 28

    Onix

    Mega EvolutionMega Evolution70/1322025Common

    $0.16

    Ungraded

    PSA 10 $31.37

  29. 29

    Onix

    Scarlet & VioletParadox Rift90/1822023Common

    $0.14

    Ungraded

    PSA 10 $34.99

  30. 30

    Onix

    Sword & ShieldPokémon GO36/782022Common

    $0.13

    Ungraded

    PSA 10 $27.99

  31. 31

    Onix

    Sword & ShieldBattle Styles68/1632021Common

    $0.12

    Ungraded

    PSA 10 $45.00

Graded

Ungraded, PSA 9 and PSA 10: the top 5

Onix, Southern Islands 3/18

  1. Ungraded

    $68.40
  2. PSA 9

    $156

    2.3x the ungraded price

  3. PSA 10

    $950

    13.9x the ungraded price

Ungraded, PSA 9 and PSA 10 values of the top 5 cards, with the PSA 10 multiple of the ungraded price
CardUngradedPSA 9PSA 10
Onix 3/18Southern Islands$68.40$156$950
Brock's Onix 21/132Gym Heroes$9.97$17.50$238
Onix 9/12McDonald's Collection 2019$9.29$44.95$58.32
Onix 10/34Pokémon TCG Classic - Venusaur$8.99$30.00$50.99
Onix 98/147Aquapolis$8.22$25.20$74.40

Graded values are read from sales of slabbed copies. When grading pays.

Common questions

What is the most expensive Onix card?

Onix 3/18 from Southern Islands, at $68.40 ungraded and $950 as a PSA 10.

What is the most expensive modern Onix card?

From the Scarlet & Violet era onward, Onix 10/34 from Pokémon TCG Classic - Venusaur leads at $8.99 ungraded.

How many Onix cards are worth over $100?

Of the 31 Onix cards with a price, 0 are worth $100 or more ungraded. The rest sell for less, most of them for a few dollars.

What makes a Onix card valuable?

Scarcity, condition and demand for the character. 4 of the top 10 here are Common cards. Condition is the other lever: Onix 3/18 from Southern Islands is worth $68.40 ungraded and $950 as a PSA 10, 13.9 times more.

How often are these prices updated?

Every day. The prices on this page were last read Nov 12, 2026, from recorded sales of each card.