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5 facts about this card
Dialga-GX #138 is the Secret Rainbow Rare version from Sun & Moon—Forbidden Light, giving this time-controlling Legendary one of the flashiest chase-card treatments of the era.
Dialga’s entire identity is tied to time in the video games, where official Pokémon material describes it as the master of time, making Timeless-GX a remarkably on-theme attack for the card.
Forbidden Light was officially promoted as an expansion built around the mysterious power of Necrozma and the fallout from Ultra Prism, so this Rainbow Rare Dialga-GX feels like a direct callback to Sinnoh’s cosmic legends inside a set defined by high-stakes Legendary drama.
All three Forbidden Light prints of Dialga-GX—the regular, Full Art, and Secret Rainbow Rare—were illustrated by 5ban Graphics, giving collectors a neat trio to chase from the same design team.
Bulbapedia notes that this card’s regular artwork features Spear Pillar, the iconic Sinnoh location tied to Dialga’s legendary storyline, which helps connect the card back to its original Diamond and Pearl mythology.
Card Reference
Dialga GX is a Pokemon trading card from the Pokemon Forbidden Light set, card number 138, illustrated by 5ban Graphics. This card has a Secret Rare rarity, is printed in English, belongs to the Sun & Moon era, and was released in 2018. The current market price is $72.16, based on recent Raw NM sales tracked on Double Holo, with 1 listing currently available.
The current market price of Dialga GX is $72.16. Market price reflects recent Raw NM sales on Double Holo and updates as new sales come in.
Dialga GX is from the Pokemon Forbidden Light set, card number 138, released in 2018.
Whether Dialga GX 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 Dialga GX 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.