I was shocked when my Megalogrowmon digivolved into a Mega especially when he’s already ag

I was shocked when my Megalogrowmon digivolved into a Mega especially when he’s already age 17. I was training while waiting for him to pass away; instead he digivolved into Darkdramon. I felt like a kid again who just got her first Ultimate digimon back in those days. ;v; He’s also my first Mega level digimon in this game.