Hm not sure but I know Final Fantasy is easily the biggest of any JRPG franchise xD
You know wrong lol, Pokémon is more than double bigger. And is not the only bigger.
2020 predictions: NSW 25m, PS5 6m, XSX 4.5m, PS4 9m, XB1 3m
In December 2019 i predicted 21m Switch, but that was before COVID, obvius increased my predictions.