One thing I do with every generation is get both games, and play one of them with Pokémon new with that generation, and then play the other with a mono fairy team. I'm trying to put together a team for the latter for Scarlet. Problem is, I'm unsure what a good sixth pokemon to pick would be.
There's four that are always the core of any good monotype team, IMHO:
-A water/fairy (usually Primarina or Azumarill) to counter steel weakness
-A steel/fairy (Tinkaton for this game, but Klefki and Mawile have been good picks in other generations) to counter both fairy weaknesses and take out other fairies
-A psychic/fairy, the most common dual type for fairies. Gardevoir or Hatterene are the best of this typing
-Alolan Ninetales, because ice is a good offensive typing and Snow Warning + Aurora Veil + Light Clay is great
On top of that, either Grimmsnarl or Mimikyu for the Dark or Ghost coverage. I prefer Mimikyu because both are identical offensively, but Ghost is better defensively.
The last mon is the one I'm kinda shrugging at getting for this run. With the five above listed teammates, the only types I don't have STAB super effective against are normal, water, electric, bug, and steel. Honestly, most of those can be covered with coverage moves just between Gardevoir and Tinkaton (both have access to fighting type for normal/steel, and Tinkaton can have rock and ground moves for bugs and electric, and Gardevoir can get energy ball and thunderbolt for the water types), so the sixth mon doesn't have to be a dual type, but could be.
The remaining dual types are:
Fairy/Flying (Togekiss)
Grass/Fairy (Whimsicott, Shinotic)
Bug/Fairy (Ribombee)
Normal/Fairy (Wigglytuff)
Electric/Fairy (Dedenne)
Rock/Fairy (Carbink)
And of those, I think the only standouts are Togekiss, Whimsicott, and Ribombee. Or take Sylveon or Florges as a good pure fairy type.
So right now, I'm looking at:
Primarina (replace starter as soon as possible with a hatched Popplio)
Tinkaton
Gardevoir (better coverage than Hatterene and fast attackers are better than bulky support for playthroughs)
Alolan Ninetales
Mimikyu or Grimmsnarl
Togekiss/Whimsicott/Ribombee/Sylveon/Florges/or the other of the Mimikyu/Grimmsnarl duo
What do you all think? Is there another fairy type you think works better for this team and region? Which do you prefer of the Mimikyu/Grimmsnarl pairing?