Here's why:
* Multiple generations: There are currently 9 generations of Pokemon games, each with multiple versions (like Red/Blue, Ruby/Sapphire, etc.).
* Different platforms: Games are spread across various platforms, including Game Boy, Game Boy Color, Game Boy Advance, Nintendo DS, Nintendo 3DS, Nintendo Switch, and even mobile devices.
* Rare and expensive versions: Some early versions are incredibly rare and expensive, especially if they are sealed or in excellent condition.
* Physical vs. digital: You'd need to consider both physical copies and digital versions, as some games are only available digitally.
* Foreign releases: There are also numerous foreign releases, which adds to the complexity.
In summary: While it's technically possible, it's a significant financial and logistical undertaking to own every single Pokemon game. It would be much more practical to focus on collecting the games that are most important or meaningful to you personally.