digimon double diamond booster box Card Game Dual Revolution Pack BT-25 ENGLISH, 12 Cards Bandai Dive into the digital world with Digimon’s amazing card game in their Double Diamond collection Digimon Double Diamond BT-06 Japanese

The "Legendary Dragon" cards look fun, and have been reprinted 3 times now, but are still unplayable at a tournament level (thanks for that wording, Timaeus)

Swap it and something you won't care about, like a Food Token

Here are the cards, and the booster packs they're found in, for the Champion of the Sinnoh Region Secret Mission: Gastrodon #161 (Full Art / One Gold Star) - Palkia Space-Time Smackdown Lucario #170 (Full Art / One Gold Star) - Dialga Space-Time Smackdown Spiritomb #172 (Full Art / One Gold Star) - Palkia Space-Time Smackdown Garchomp #175 (Full Art / One Gold Star) - Palkia Space-Time Smackdown Cynthia #192 (Full Art / Two Gold Star) - Palkia Space-Time Smackdown Rewards: Garchomp Emblem

Luckily, LP copies can be picked up for about $60 while moderately played (MP) sales drop to as little as $44