How do you get halsemon in Digimon world dawn?

You can't get Halsemon in Digimon World Dawn. Halsemon is a Digimon from the Digimon World series, but it was introduced in Digimon World 3.

Digimon World Dawn and Dusk do not feature any Digimon from Digimon World 3.

While you can't get Halsemon in Digimon World Dawn, you can get other powerful Digimon by evolving your chosen Digimon through different training methods and by using specific items.