Your Digimon has a set lifespan (around 15–20 hours). It will evolve several times:
After reaching Mega, your Digimon will eventually die and leave behind an egg. That egg’s stats and unlocked evolutions carry over slightly, so each generation gets stronger. digimon world re digitize evolution guide psp
The game doesn’t tell you exactly which evolution you’ll get, but you can: Your Digimon has a set lifespan (around 15–20 hours)
Behind the scenes, the game runs on a point system. When your Digimon reaches a specific age (e.g., 3 years old, 6 years old), the game looks at a checklist. If you meet the requirements for Greymon, you get Greymon. If you meet multiple requirements, the game prioritizes the rarest/most difficult one. After reaching Mega, your Digimon will eventually die