I just got to the 4th island and being the indecisive fuck that I am I still only have 5 pokemon on my team....so....help me fill this last slot please.

Has to be a new mon (alola forms are fine), I'd prefer not to overlap types if I can avoid it, and I'd also prefer not to use Kommo-o like everyone else (although that's what this is looking like....)

Decidueye, Ribombee, Salazzle, Sandslash, Wishiwashi