The Miracle DE is a Digimon from Digimon World 3, a PlayStation 2 game. It's a special evolution for the Digimon DemiDevimon, which can evolve into Miracle DE by fulfilling specific requirements.
The Miracle DE is not featured in Digimon World DS. However, you can still get a powerful Digimon by following the game's mechanics and training your Digimon carefully.