All of the cards found within the two Half Decks are reprints from HeartGold & SoulSilver. The cards Gyarados and Raichu (both Holofoil and non-Holofoil versions) have alternate artwork to their HeartGold & SoulSilver counterparts. Also, the Energy cards from the Half Decks do not have the Pokémon/location image additions their HeartGold & SoulSilver counterparts feature.
None of the cards have Rarity symbols and they each feature a collection number and set symbol exclusive to the kit. Every card in each of the Half Decks has an individual collection number, unlike past Trainer Kits where multiples of one card share the same collection number.
In addition to the Half Deck, the HS Trainer Kit also includes a HeartGold & SoulSilver Booster pack, damage counters, status counters, a custom coin with Pikachu, and playmat. A new addition to the kit is the inclusion of a Trainer Kit Guide, which takes players from Set Up through to their 8th turn of an example battle. There is one guide for each of the Half decks included. Another new addition comes in the form of a 60-card deck box, featuring Gyarados and Raichu.