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4 facts about this card
This exact Onix artwork has extra collector mystique because the Trainer Deck A version was distributed to prototype Pokémon Leagues before Base Set officially released, with a red border and "Trainer Deck A" printed on the back.
Onix’s massive 90 HP made it one of the bulkiest Basic Pokémon in early Base Set play, and Harden fit that wall-like identity by blocking lighter hits on the following turn.
Collectors prize this card’s clean vintage look because it was illustrated by Ken Sugimori, the primary character designer and art director of the Pokémon franchise who helped finalize the original 151 Pokémon.
Onix feels especially nostalgic in Base Set because it is Brock’s signature powerhouse in the original Kanto journey, where Brock fields Onix as part of his first Gym challenge against Red.
Card Reference
Onix [Trainer Deck A] is a Pokemon trading card from the Pokemon Base Set set, card number 56. This card is printed in English, belongs to the Wizards of the Coast era, and was released in 1999. The current market price is $124.99, based on recent Raw NM sales tracked on Double Holo.
The current market price of Onix [Trainer Deck A] is $124.99. Market price reflects recent Raw NM sales on Double Holo and updates as new sales come in.
Onix [Trainer Deck A] is from the Pokemon Base Set set, card number 56, released in 1999.
Whether Onix [Trainer Deck A] is worth grading depends on its condition and the graded population for the card. Higher grades command larger premiums, so review recent graded sales and use Double Holo's Grading ROI tools to weigh the cost of grading against the expected graded value before submitting.
You can buy or sell Onix [Trainer Deck A] on the Double Holo marketplace, which pairs live listings with a bid and ask order book, so you can set your own price or take the best available offer. Sellers pay a 4.9% platform fee on completed sales, with a $1 minimum.