The Five Most Valuable Cards in Pokémon’s EX Hidden Legends Set

EX Hidden Legends, the fifth main expansion of the EX Series, was released on June 14, 2004.
In Japan it carried the far moodier name Undone Seal, and that idea of broken seals runs right through the release.
This is the set that finally brought the legendary golem trio, Regirock, Regice, and Registeel, into the card game, and it paired them with the Hoenn box art titans Kyogre and Groudon.
A few things make Hidden Legends stand out the moment you start opening packs. It was the set that dropped the e-Reader dot code strip along the bottom edge, though the border returned to its normal look after a couple of experimental years.
It also gave the game its first ever card with four separate attacks in Exploud, a fun bit of trivia to drop at the table.
Beyond the headliners, keep an eye out for the Jirachi Holo that anchored the WishMaker theme deck and the always popular Dark Celebi.
The real money, though, lives at the top of the checklist, so here are the five cards commanding the highest prices today.
The Most Valuable Pokémon’s EX Hidden Legends Cards
Kyogre ex #94/101 – Ultra Rare
Kyogre ex is the undisputed value king of the set, and it is also the most liquid card at the top, which makes its pricing the easiest to trust.
This 100 HP Water Basic leans hard into set flavor with its Mark of Antiquity Poke-BODY, which stops each player’s Groudon ex and Rayquaza ex from attacking while Kyogre ex sits Active, a neat nod to the ancient rivalry the whole expansion is built on.
Raw copies have been trading around $75, with clean ones pushing past $100.
Graded is where the numbers open up. A graded 9s have recently sold in the $500 to $800 range and graded 10 copies have sold between $3,300 and $4,100, putting it among the priciest cards of the early EX stretch.
Copies with a holo swirl command an added premium.

Ninetales ex #96/101 – Ultra Rare
Here is the surprise of the set. Ninetales ex is not a legendary, yet it runs neck and neck with Kyogre on the raw market, changing hands around $100 and often more for a clean holo.
Ninetales has always pulled collectors, and the fiery, golden artwork on this one is a genuine fan favorite that sits happily on any Fire themed display page.
The graded population is thin and prices swing hard, with recent graded 10 sales landing anywhere from roughly $1,250 to $3,500 depending on the day and the buyer.
On a card this scarce in top grades, treat any single sale as a moving target rather than a fixed value.

Groudon #102/101 – Secret Rare
Every one of these EX era sets hides a Secret Rare at the very end of the checklist, and in Hidden Legends that honor goes to Groudon – numbered 102/101.
This Holo Groudon is a completely separate card from the standard Groudon ex at 93/101, which is itself a solid chase hovering in the mid-$60s raw.
The Secret Rare is the one that collectors set aside. It has been trading around $90 in recent Near Mint sales, comfortably ahead of the standard Groudon ex.
With Pristine copies, and especially with a clean Holo swirl, it sits right at the top of the set’s rarity ladder and is the toughest of the Hidden Legends chase cards to land in flawless condition.

Regice ex #97/101 – Ultra Rare
Of the three legendary golems that the set is literally named for, Regice ex is the priciest, trading around $110 raw.
Its full card shard foil, a treatment shared across all three golems, makes it the one that collectors want to see under a light beyond the others. Furthermore, it backed up the looks with a real table presence in 2004.
The Crystal Body Poke-BODY shrugged off the effects of an opponent’s attacks, while a heads on its Freeze Lock attack shut off their Energy attachments for a turn, a frustrating wall for anyone trying to set up across the table.

Regirock ex #98/101 – Ultra Rare
Rounding out the group is Regirock ex, trading around $100 raw and completing the trio that gives the set its centerpiece display.
Registeel ex at 99/101 sits just behind it in the low $50s. If you are chasing the golems, budget for all three because collectors almost never want just one.
Held side by side, the trio is one of the more satisfying vintage display sets you can still assemble without a treasure hunt, and it captures exactly what this expansion was trying to do, unseal Hoenn’s ancient giants and set them loose on the table.

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