The 10 Most Expensive Onix Pokémon Cards
Onix may not be the first Pokémon that comes to mind when you think of high-value cards, but for collectors, this rock-solid serpent has some surprisingly pricey gems. Spanning multiple sets from the early days of the Pokémon Trading Card Game, Onix has cemented its place in the hearts (and wallets) of fans everywhere. Prices seem to rise and fall like the tides, driven by nostalgia, rarity, and a touch of that collector's desire for shiny things. With Reverse Holofoils and unique artwork in the mix, Onix's value may just take you by surprise.
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The Onix from Legendary Collection #84 commands a staggering $70.21 for its Reverse Holofoil version, and for good reason. As part of a beloved set featuring reprints of some early favorites, this card's nostalgic factor is through the roof. The bold colors and retro design art appeal to both collectors and those who appreciate Pokémon history. Its availability is limited, adding to the demand and making it a must-have for serious collectors.
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Coming in hot at $65.00, the Reverse Holofoil Onix from Aquapolis #98 is another fan-favorite. Aquapolis, known for its stunning artwork and late-gen feel, brings a captivating image of Onix that really stands out. This card's scarcity boosts its value, as collectors are always on the hunt for those unique pieces. Plus, it's a part of the e-Card series, which features some seriously fun mechanics. A solid addition if you're building a nostalgic collection.
The Reverse Holofoil Onix from Team Rocket Returns at $39.89 may not break the bank, but it sure packs a punch in the collector's market. This set is notorious for its edgy vibe, and Onix fits right in with its dark, mysterious artwork. The Team Rocket-themed cards have always drawn interest due to their unique mechanics and semi-competitive edge. This particular printing is rare enough to keep collectors on their toes, driving its price up.
The Southern Islands #3 Onix is a unique card that breaks away from the Holofoil trend, sitting at $37.10 for its normal version. Its stunning artwork showcases the lush, tropical vibe of the Southern Islands collection, making it a beautiful addition to any collection. Given its unknown rarity, collectors often speculate about its value, which adds an element of intrigue. This card is more about aesthetics and nostalgia than gameplay, but don’t underestimate its appeal!
At $28.67, the Reverse Holofoil Onix from Unseen Forces brings a sense of nostalgia with its classic card design. Unseen Forces is a revered set for its rich mechanics and fan-favorite Pokémon, making this card a charming piece for any collector. The card's nostalgic vibe comes from its iconic art style, and while supply is relatively decent, it's the unique holo pattern that drives the price. A solid choice for those looking to snag a piece of TCG history.
The Reverse Holofoil Onix from FireRed & LeafGreen clocks in at $16.20, showcasing one of the more dynamic designs in the Onix lineup. This set is all about nostalgia, pulling players back to the original Kanto region, and the artwork reflects that sentiment beautifully. As a Reverse Holofoil, it carries a bit of that sparkle collectors crave, making it a solid investment for those who've got a special place in their heart for classic Pokémon. Not too shabby for a rock-type, right?
Brock's Onix from Gym Heroes #21 is a great nostalgic piece at $12.25, especially in its 1st Edition version. Gym Heroes is legendary among fans, and this particular card's rarity and connection to Gym Leader Brock give it a unique appeal. The artwork captures Onix perfectly in its iconic style, leading to its standout status in the set. If you’re a Brock fan or just looking to complete a Gym Leaders collection, this little guy is a worthy pick-up.
The Reverse Holofoil Onix from Sandstorm is a solid find at $11.88, especially considering the set's popularity. Sandstorm introduced some memorable cards and mechanics, and Onix stands out with its unique blend of competitive playability and rich artwork. With its availability being decent, this card is a nice balance of collectability and affordability. It’s an ideal entry point for those looking to dive into the world of Onix cards!
The Onix from the McDonald's Collection 2019 may only cost $7.80, but it packs a punch in terms of nostalgia and unique design. This set was a fun promotional venture that has since become a collector's favorite, making it an essential piece for anyone looking to grab a slice of unique history. The holo treatment adds a special flair, and while it's not the highest price point, it’s perfect for collectors who appreciate those quirky, limited-time releases.
Finally, the Reverse Holofoil Onix from HS—Unleashed at $4.49 is a steal for any Onix lover. This card features vibrant colors and a nostalgic style that harkens back to the golden days of Pokémon. While it may not be the most valuable card, it's got an undeniable charm that can fit well in any collection. Plus, it's a great card to snag if you want a piece of the Unleashed set without breaking the bank!
Now's a decent time to collect Onix cards if you're on a budget. Prices for the more affordable options, like the HS—Unleashed and McDonald's Collection cards, are relatively stable, while some of the rarer Reverse Holofoils are climbing steadily. Keep an eye on the market trends; some of these Onix cards might just become the hidden jewels of your collection. Just remember — don’t let your wallet cry too much while you’re at it!
Prices last updated: April 9, 2026 at 10:26 PM UTC
Market prices sourced from TCGPlayer. Affiliate links may earn us a commission at no cost to you.
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