How do you crack an egg in Pokemon Black and White?

You can't crack an egg in Pokémon Black and White (or any other Pokémon game).

Eggs in Pokémon games are used to hatch new Pokémon. To hatch an egg, you need to walk a certain number of steps while carrying it.

Here's what you can do with an egg in Pokémon Black and White:

* Carry it: You can hold the egg in your party and walk around with it.

* Check its progress: You can check the egg in your party to see how close it is to hatching.

* Hatch it: After walking enough steps, the egg will hatch, revealing a new Pokémon.

You can't interact with the egg in any other way, like cracking it open or using it in battle.