I think Rapidash should be at least A Rank. He now has a niche which is spamming extremely powerful Fire-type Physical moves in NU, with Emboar gone to the lands of RU. CB hits incredibly hard, Scarf is pretty fast, EBelt fakes a Choice set and LO is just plain good. With Wish support, he is really good. He has a good movepool, similar to Emboar's (Without the Fighting-type moves).
Shedinja sez: ''Enigma Berry sucks.''