If you want to play official Digivice-style games from handheld consoles like the WonderSwan or Game Boy, you can use general-purpose Android emulators:
For those who want a nostalgic VPet experience similar to the original 1997 Digimon devices, RetroMon is a highly-rated option available on the Google Play Store. How to Set Up Your Digivice Emulator digivice emulator android
Search the Play Store for "V-Pet" or "Digital Monster." There are several independent developers who have created open-source or free simulators that mimic the LCD style of the original 1997 and 1998 Digivices. Some even support the "shake to walk" mechanic using your phone's accelerometer! If you want to play official Digivice-style games