How do you play with a digimon in digimon world ds?

To obtain digimon after your starter, you must find them in the wild. it will be scanned. If you find a certain digimon enough times it will reach 100%. now go to your digifarm, select the digimon...

Play Time refers to the amount of time spent playing the game.

yes

about 20% through the game (or something like that), you can get a special device that can make you degenerate

1.gain 100% scan of digimon after that go to digimon convert at digifarm. 2.you can get digimon at digimon list same place after that you change your digimon location. 3.you put your digimon in party.