How do you get a murkrow on Pokemon black?

You can't get a Murkrow in Pokemon Black. Murkrow is exclusive to Pokemon White.

Here's why:

* Version Exclusives: Many Pokemon are split between different versions of the game. This encourages trading and adds variety to the experience.

* Murkrow in White: You can find Murkrow in Pokemon White in the following locations:

* Route 12: After defeating the first gym leader, Cheren, you'll find Murkrow roaming the area.

* Castelia Sewers: Murkrow can also be found here.

If you're looking for Murkrow in Pokemon Black, your only option is to trade with someone who has a Pokemon White game and has caught one.