The XY Trainer Kit: Latias & Latios is the third Trainer Kit released throughout the XY Series and features Latios and Latias, the Pokémon featured in the EX Trainer Kit released in June 2004. Like that Trainer Kit, the two cards are exclusive to the Trainer Kit. The Latias and Latios cards are the first English card of these Pokémon to be printed as Psychic-type. None of the cards have Rarity symbols and they each feature a collection number and set symbol exclusive to the kit. The collection numbers are the order of the cards in the two Half Decks for the example battle allowing for easy reset if the decks are accidentally shuffled prior to use for example battle.

In addition to the Half Deck, this XY Trainer Kit also includes a deck box, rulebook, damage counters, status counters, a custom coin featuring the Hoenn starters, and playmat. The kit also includes a Trainer Kit Guide, which takes players through an example battle. There is one guide for each of the Half Decks included.