How do you get 300 plus attack in digimon world ds?

To achieve over 300 attack in Digimon World DS, focus on training your Digimon's attack stat through specific training sessions, such as the "Attack" training option at the Gym. Additionally, equip your Digimon with items that boost attack, like the "Power Charge" or "Mighty" items. Lastly, consider evolving your Digimon into stronger forms that naturally possess higher attack stats, and utilize effective battle strategies to maximize their potential.