Give the password to Valkyriemon inside the DigiColiseum.
Password - Effect
19970628 - Obtain 100% Scan Data for DotAgumon
70307991 - Obtain 100% Scan Data for DotShineGreymon
82607991 - Obtain 100% Scan Data for Numemon
02619020 - Obtain Legend Sword, Legend Robe, and Legend Ring