How the Digivolution system works in Digimon Story: Time Stranger
In the current version of Time Stranger, Digivolutions can occur outside of combat without needing a specific location such as the DigiLab, unlike previous Cyber Sleuth games. If you haven’t encountered or developed a certain Digimon before, their Digivolution and De-Digivolutions will be shown as silhouettes, but the game will provide you with the necessary requirements to achieve them. These basic requirements typically include reaching a specific Agent Rank and meeting certain stat thresholds. It appears that Agent Rank can increase through main story progression and potentially side quests, although I wasn’t able to confirm this during my playtime.