From Bulbapedia, the community-driven Pokémon encyclopedia.
Dialga has been featured on 15 different cards since it debuted in the Diamond & Pearl expansion of the Pokémon Trading Card Game. Dialga cards are normally Metal-type or Dragon-type Basic Pokémon. In Japan, Dialga was featured in the Dialga LV.X Constructed Standard Deck released in July 2007, as well as the Giratina vs Dialga Deck Kit released in July 2008 and the Entry Pack DPt released in October 2008.
List of Pokémon cards featuring Dialga