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6. Individual Values (IV)
IVs in orange at the bottom right of the image
These are stats that are randomly generated for each Revomon you will catch in the game.
This number is randomly generated from 0 to 31.
IVs are permanent and cannot be altered (as of Patch 1.9).
In competitive Revomon, this means that you would want to have higher IVs on the stats that you want (the higher, the best). If you want high damage on Physical attacks then the higher ATK IV you have the stronger the damage that Physical Skills get.
A Revomon gathering a lot of IVs close to 31 is considered as "god-tier" and even more valuable if it matches with the right nature and ability.