* Print run: Some cards were printed in smaller quantities than others.
* Set popularity: Certain sets, like the "Diamond & Pearl" series, were more popular than others, potentially making cards from those sets rarer in the long run.
* Condition: A card's condition (mint, near mint, played, etc.) greatly affects its value and rarity.
* Specific card: Within a set, some cards are more desirable than others, like certain holos or full-art cards.
Strong contenders for the rarest Pokemon card in 2008 might include:
* The "Diamond & Pearl" set (2007-2009): This set is considered valuable, and cards like the "Full Art" Pokémon Trainer cards and Secret Rare Pokémon cards are quite rare.
* Promo cards: Promo cards are often given out at events, and their rarity can depend on the event and the card's distribution.
* Rare versions of popular cards: For example, the "Full Art" Charizard from the "Diamond & Pearl" set is highly sought after.
To get the most accurate answer, you'd need to:
* Specify the specific set: Are you interested in cards from a specific set, like "Diamond & Pearl"?
* Consider specific card types: Are you looking for holos, secret rares, or full-art cards?
* Factor in condition: A card's condition has a significant impact on its value and rarity.
Remember, rarity and value are subjective and can change over time. You can find information on Pokemon card prices and rarity on websites like TCGPlayer and Troll and Toad.