Angewomon and Angemon release Golden Digi-Eggs to Davis and Willis, allowing Veemon and Terriermon to Golden Armor Digivolve to Magnamon and Rapidmon. Kokomon de-ages all the DigiDestined, and they realize that "go back" meant to go back in time to when the virus first attacked.
Angewomon and Angemon gift Davis and Willis with Golden Digi-Eggs, which enables Veemon and Terriermon to evolve into Magnamon and Rapidmon. However, Kokomon reverses all the transformations, causing the DigiDestined to revert to their earlier forms. As a result, they grasp that "go back" signifies a return to the point in time when the virus initially launched its attack.