How to people find rares that grades are like B A and even S mine are always D and E…
Its all luck, but you can get them from eggs and the rewards are all S i believe.
I’d say 98%of them get it from eggs. The rewards are NOT all S, they always start with 1 grade above the best you currently have. I think the lowest is C though, and once you have A grade they will remain S.
Farm for a long long time!