We think you can do better. We recommend at least 5 perfect IVs. The Good part is that Greninja is very flexible and depending on with IVs you manage to max out, you can run different effective sets. If for example Atk happens to be the low stat, go full on special attacking; should one of the defensive stats be low, you can run mixed. Look at the video above your post for a guide to breeding.How usable would a 31/x/x/31/x/31 timid greninja be?
It is a bit difficult to make sense of what you have written but we will give it a shot.Why is there even a pokebank list with all the banned pokemon unbanned
Banned Pokemon are banned because they have been banned. As you can see in the list, there is actually nothing in the regular list that is not banned in the Pokebank list. The regular list contains Mewtwo, Xerneas, Yveltal and Moody, all of which are also in the Pokebank list.