Murkrow was a Pokémon introduced in the second generation of Pokémon games. It was one of the less threatening Pokemon in the game as it had rather low stats. Then came Generation IV and there was an evolution: Honchkrow. Getting evolution isn't as easy as just leveling up your Murkrow. Here's how to evolve Murkrow into Honchkrow in Pokémon Brilliant Diamond and Shining Pearl.
How to evolve Murkrow into Honchkrow in Pokémon Brilliant Diamond and Shining Pearl
To do this you will need a Twilight Stone. It's an evolutionary stone much like the stones needed to evolve Eevee, except this one can't. This one is tied to a lot less Pokemon. However, Honchkrow's stats are far superior to Murkrow's, aside from his Speed stat.
Ideally, you would like wait until your Murkrow reaches a level between 45 and 55 so it can actually learn a few moves along the way. If you caught a Murkrow in Eterna Forest, it will be lower level. If you decide to evolve it into a Honchkrow when it's gained a few levels since then, it won't learn many new moves along the way unless you apply a TM or relearn the move to bring back some movements.
Fortunately, if you own Pokémon Shining Pearl instead, you can use the Dusk Stone to evolve Misdreavus into Mismagius. Murkrow is exclusive to Brilliant Diamond while Misdreavus is exclusive to Shining Pearl. Both of these Pokémon use the Dusk Stone and work the same way in terms of leveling up.
Be sure to use your stone very carefully though. As far as we know, you can only get about three Dusk Stones in a save file. Use it when you have your Murkrow with favorable stats to maximize its potential later.
Shiny Diamond and Shiny Pearl Pokémon are now available exclusively for the Nintendo Switch.