In order to maintain the digivolution (all forms besides Rookie), a certain amount of DS is consumed over time. This consumption can be nullified/reduced by having an 'DigiAura' equipped.
When not in battle, Tamer DS is recovered by a certain amount:
Note: It seems that having a DigiAura will increase DS recovery even further, so instead of recovering 2% DS every 5 sec, Tamer will recover 2% DS every ~4.1 sec.
This table shows the Tamer DS required to digivolve from a stage to another depending on the Digimon level
R-C-U-M Total DS required to digivolve from Rookie to Champion, then from Champion to Ultimate, then from Ultimate to Mega
R-U-M Total DS required to digivolve from Rookie to Ultimate, then from Ultimate to Mega
R-C-M Total DS required to digivolve from Rookie to Champion, then from Champion to Mega
Note: Evolving from Mega to Side Mega consumes 0 DS
Mercenary DigiEgg Drop Locations Advance Skill Breaking Raid Boss Debuff System Digimon Table DS Table Stat Formula Experience Table Game Patches Glossary Unused Content