Quick summary
The digimon that you start with is Shoutmon/Greymon/Darknightmon(depending on which mini you get.). There are no baby, child and rookies stage.
Press A
-Feed your digimon food or pill
-Inject your digimon if it gets sick
-Clean poop
Press B
X battle(Xcros Battle)
-If you beat a digimon that you can xcros with, you can then select whether you would like to xcros with the beaten digimon.
C Battle(Connect Battle)
Press C
Battle percentage
Press A+C to turn on/off sound
Press C for a few seconds and it will brings you clock
Back view
Inside + Instruction sheet
Xcros chart