* Eevee's rarity: Eevee's availability varies depending on the game. In some games, it's a common encounter, while in others it's rarer.
* The type of Poké Ball: While a regular Poké Ball will work, using a higher-quality Poké Ball like a Great Ball or Ultra Ball will increase your chances of catching Eevee.
* Eevee's level: A lower-level Eevee will be easier to catch than a higher-level one.
So, while you can catch Eevee with a Poké Ball, your success rate will depend on various factors. Good luck!