The greatest Trainers are those who are fearless in the face of battle. And that's you! In the Pokémon TCG: HS—Undaunted expansion, you'll discover battle-ready Pokémon just waiting to be summoned by the fearless Trainer in you! The powerful Rayquaza and Deoxys become a Pokémon LEGEND to be reckoned with...six Pokémon—from Raichu to Umbreon to Slowking—join the ranks of Pokémon Prime...and Stadium cards like the Ruins of Alph and Trainer cards like Legend Box change every player's strategy. Are you ready to be Undaunted?
Undaunted is the third expansion of cards in the HeartGold & SoulSilver Series of the Pokémon Trading Card Game. It features Darkness and Metal-type Pokémon and was released in English on August 18, 2010. The Japanese equivalent release, Reviving Legends, was released earlier in the year, on February 11, 2010, and is the second LEGEND Era expansion. Released the same day in Japan were the Tyranitar and Steelix Constructed Standard Decks. The expansion and two decks together introduce Darkness and Metal Pokémon to the Japanese LEGEND Era, in addition to featuring the Legendary beasts as brand new, dual-type Pokémon LEGEND cards. All releases continue featuring artwork from around the Johto region, and release the first Stadium cards of the HeartGold & SoulSilver Series and LEGEND Era.
The English release of this expansion is primarily made up of most of the Reviving Legends expansion and the Japanese Tyranitar and Steelix Constructed Standard Decks, as well as the four remaining cards from the Battle Starter Decks and the Leafeon vs Metagross Expert Deck, and six L-P Promotional cards. Due to the Japanese set's Pokémon LEGEND being released one English expansion earlier in Unleashed, Undaunted pulls Kyogre & Groudon LEGEND and Rayquaza & Deoxys LEGEND forward from the next Japanese expansion, Clash at the Summit. Thus, these four LEGEND pieces were released in English only one month after their Japanese release.
Reviving Legends contains 4 Pokémon Prime cards—Kingdra, Lanturn, Tyranitar, and Steelix—all of which were not released in Undaunted and were released one set earlier in Unleashed instead, alongside the six Reviving Legends LEGEND pieces (Entei & Raikou LEGEND, Suicune & Entei LEGEND, and Raikou & Suicune LEGEND). The English release, instead, takes the two Pokémon Prime from the Tyranitar and Steelix Constructed Standard Decks, and four Promotional Pokémon Prime to release the standard amount of six Pokémon Prime per release. These Pokémon are Espeon, Houndoom, Raichu, Scizor, Slowking, Umbreon.
Undaunted also features the Eevee evolutionary family. Espeon and Umbreon are the spotlighted Pokémon for this expansion's two Theme Decks: Daybreak and Nightfall. Both of these two Eeveelutions also appear as Pokémon Prime, and were the Pokémon featured on this expansion's Prerelease sleeves. However, Glaceon does not receive a card, due to the Leafeon and one of the Eevee originated from the Leafeon vs Metagross Expert Deck. The other five evolutions originated from the Reviving Legends expansion, which did not feature Leafeon or Glaceon, due to the fact that they cannot be obtained in Pokémon HeartGold and SoulSilver without trading them from Pokémon Diamond and Pearl or Pokémon Platinum. Thus, all Eeveelutions but Glaceon were in the English release.
The Prerelease promo for this set is Leafeon. Officially, the English release of the set contains 90 cards. Between alternate Holofoils, promotional stamps, Reverse Holofoils, and Secret cards, the set contains 183 cards. A list of the non standard cards can be seen below.