Hidden power ice, ground or fire?
I'm not sure which one to get for Tapu Koko. Any help would be appreciated.
Personally, I would recommend Hidden Power Ground because it gets more coverage and covered one of Tapu Koko's Weakness which is Poison. Hp Fire and Hp Ice only covers 4 types, while Hp Ground Covers 5 types so you can take on more opponents. Obviously, Hidden Power Ground is the the better Choice.
Source : Experience
Hidden Power water or fighting would be good for breaking down those mudsdale and other tanks.
Hidden powers that would be good:
Water- beat ground types
Psychic- Beats poison types
Edit: Any hidden power to beat steel isn't recommended since electric cancels it from being super effective cause of your fairy typing.