Alright, this will be posted in the first post, under the Digivolution tab:

[quote]Digivolution uses energy both on the Tamer's part and a Digimon partner's part. The number of Digivolutions possible at one time is all dependent on a Tamer's mental fortitude and emotional state. For example, if a Tamer is depressed, none of their Digimon can evolve, but they can Mode Change. How long a Digimon can stay Digivolved: generally as long as in the shows.[/quote]