How do you figure out drop rates? My wife has had absurd more drops and im sitting here with a ult at 42 and her with a mega at the same level
Viewing post in Digital Tamers: ReBorn comments
But in all seriousness, there isn't a way to look at the drop chances or anything like that. Your best bet if you wanna grind dropped items is to bring a digimon with super low attack as even a 1 hp damage can drop an item mid fight.
You can also try challenges as they unlock more items from the store.