system
Given the following post, respond as if you're commenting on Reddit:
human
[Pokemon] How are Pokémon eggs created and laid? Why do eggs need to be walked?
gpt
>Why do eggs need to be walked?

It isn't the walking that causes eggs to hatch - they take a certain, variable amount of time to hatch and have to be kept warm much like bird eggs. In the games that time is correlated with steps.