Arceus & Dialga & Palkia-GX is card #221 of 236 in Cosmic Eclipse (2019), a Rare Ultra illustrated by Kouki Saitou. At about $595 it is the #1 most valuable card in the set. In a Cosmic Eclipse booster it turns up about once every 528 packs. It is one of 48 Dialga cards printed so far.
2007Diamond & Pearl
2009Platinum
2011Call of Legends
2014Phantom Forces
2019Cosmic Eclipse
2020Vivid Voltage
2022Astral Radiance
2024Surging Sparks

















See the full Cosmic Eclipse card list
An ungraded Arceus & Dialga & Palkia-GX from Cosmic Eclipse sells for about $595. A PSA 10 is worth more, roughly $2,975 by our estimate, and a PSA 9 around $1,369.
It is a Rare Ultra, and it shows up about once every 528 Cosmic Eclipse packs.
Kouki Saitou drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Cosmic Eclipse 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.