The Trainer Kit was supposed to be released on August 3, 2011, and be legal for the 2011 World Championships, but it was delayed for unknown reasons. It was eventually released in September that year.
All of the cards found within the two Half Decks are reprints from Black & White and Emerging Powers. The cards Excadrill and Zoroark (both Holofoil and non-Holofoil versions) have alternate artwork to their Emerging Powers counterparts. Also, the Energy cards from the Half Decks do not have the checkerboard additions their Black & White counterparts feature.
None of the cards have Rarity symbols and they each feature a collection number and set symbol exclusive to the Trainer 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 Decks, the Black & White Trainer Kit also includes a Booster pack (Black & White), a deck box featuring Excadrill and Zoroark, a rulebook, damage counters, status counters, a custom coin with Energy symbols, and playmat. The kit also includes 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.