Dialga is number 483 in the National Pokédex, a Metal type. We track 50 English Dialga cards across 25 sets. The most valuable is Arceus & Dialga & Palkia GX from Cosmic Eclipse (#221) at £411.85, and the cheapest with a value is Dialga from 30th Celebration (#103) at £0.17. Every one is below, newest set first; each opens its own page with the price history and graded values.
Dialga cards come out of boosters, and the cheapest way to open them is sealed product under its usual UK price. The newest sets with a Dialga are listed last.
The most valuable English Dialga card we track is Arceus & Dialga & Palkia GX from Cosmic Eclipse (#221) at £411.85 ungraded. 6 Dialga cards are worth £100 or more.
Our English catalogue holds 50 Dialga cards across 25 sets, from Diamond & Pearl (2007) to 30th Celebration (2026). Other languages are on each card's own page.
Grading costs from about £12 a card in the UK, so it pays only on a card worth well above the fee in clean condition. 11 of the 50 Dialga cards with a value are worth £50 or more ungraded; a high grade can add real money to those. The rest are worth less than a grading fee, so grade them to keep, not to sell. Scan yours and the scanner says whether to grade it, with the expected money.
A quick word on the figures: “market price” is what an item actually sells for in the UK right now, not an inflated recommended price, and we only count plausible live prices, so one mispriced listing cannot skew the order. Prices shift through the day, so a deal near the top can move quickly.
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