Catch rate
Catch rate is a species value from 3 to 255 that sets how easily it can be caught
Caterpie has a catch rate of 255 and most legendary Pokémon 3. From Generation III the chance rises as HP falls, is multiplied by the ball modifier, and is raised by status: 2 times for sleep or freeze and 1.5 times for paralysis, poison or burn. Black and White raised sleep and freeze to 2.5 times and added critical captures.
Main-series games; introduced in Generation I, Red and Green.
2 later changes
- Ruby and Sapphire adopted the HP and status formula still used in later games.
- Black and White raised the sleep and freeze bonus to 2.5 times and added critical captures.