From Bulbapedia, the community-driven Pokémon encyclopedia.
Latias has been featured on 17 different cards since it debuted in the Theater Limited VS Pack of the Pokémon Trading Card Game. Latias cards are normally Dragon-type or Psychic-type Basic Pokémon. In Japan, Latias was featured in the Latias Half Deck of the Gift Box released in November 2003. Outside of Japan, Latias was also featured in the Latias Half Deck of the EX Trainer Kit released in June 2004 and April 2015's XY Trainer Kit: Latias & Latios.
List of Pokémon cards featuring Latias