However, you can teach your Pokémon a similar move called Shadow Ball, which is available in SoulSilver. You can learn Shadow Ball from the following:
* Move Tutor: In Goldenrod City, you can teach Shadow Ball to certain Pokémon for a fee.
* TM23: You can find this TM in various locations, including the "TM Corner" in Goldenrod City.
* Level-up: Some Pokémon can learn Shadow Ball by leveling up.
While it's not exactly Dark Pulse, Shadow Ball is a very effective Ghost-type move and can be a good substitute in SoulSilver.