These creatures are special, limited-time Pokmon distributions that were available within the Pokmon HeartGold and Pokmon SoulSilver video games. These distributions required players to be at specific locations or use certain online services during designated periods. The Pokmon obtained typically possessed unique characteristics, such as special moves, held items, or being shiny (alternate coloration), not normally obtainable through standard gameplay within those versions of the game. Examples included promotional Pokmon like Pikachu-colored Pichu, which could unlock a special event in-game, or legendary Pokmon like Arceus, which were distributed to promote other aspects of the franchise.
The value of these distributions stems from their rarity and exclusivity. As the distribution periods have long passed, acquiring these Pokmon through legitimate means is no longer possible. They offer collectors a unique piece of Pokmon history and can enhance the gameplay experience due to their unique traits. They also played a crucial role in driving engagement with the games and associated promotions, encouraging players to actively participate in the Pokmon community and visit specific locations to obtain them. This created a sense of excitement and anticipation around the Pokmon brand.