Dialga is card #23 of 127 in Platinum (2009), a Rare illustrated by Kent Kanetsuna. At about $18.18 it is the #46 most valuable card in the set. In a Platinum booster it turns up about once every 36 packs. It is one of 48 Dialga cards printed so far.
2007Diamond & Pearl
2009Platinum
2011Call of Legends
2014Phantom Forces
2020Vivid Voltage
2022Astral Radiance
2024Surging Sparks
202630th Celebration

















See the full Platinum card list
An ungraded Dialga from Platinum sells for about $18.18. A PSA 10 is worth more, roughly $145 by our estimate, and a PSA 9 around $50.90.
It is a Rare, and it shows up about once every 36 Platinum packs.
Kent Kanetsuna drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Platinum booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.