POP Series 6 was the first promotional set of the Pokémon Organized Play program to contain cards from the DP Series, as Diamond & Pearl had already been released earlier that year and Mysterious Treasures was releasing at about the same time as this set. Many of the Japanese promo cards at the time were reprints of cards from these two sets with different artwork, which meant that only two of the 17 cards in POP Series 6 (Pikachu and Gible) were not reprints from one of the two DP Series sets.
Due to a production error, every POP 6 pack contains one rare, and one common or uncommon card.
The rare card Manaphy, the uncommon cards Gible, Riolu, Pikachu and the common cards Chimchar, Piplup, and Turtwig received holographic versions. They were available in value packs.
POP Series 6 was the first set of the series not to include a rarer card as #17 as the only promotional Pokémon LV.X card from Japan at the time, Lucario, was to be released in a promotional tin in November 2007.