I'd like to echo the suggestions that Gothitelle be ranked, probably around C. With Marshadow keeping Pokemon from setting up nearly as often, she has more targets to reliably trap, and in my experience her niche is on a team that need a consistent answer to Support forms of Arceus. She also counters the majority of stall/passive 'mons (e.g. Toxapex) and any Tapu Lele sets running Nature's Madness over Shadow Ball. I currently run:
Gothitelle @ Leftovers
Ability: Shadow Tag
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
IVs: 0 Atk
- Charm
- Rest
- Psyshock
- Calm Mind
...which, for reference, is the same set In The Hills posted a couple months ago. I don't claim to be an expert at these things, but she really seems to have legs. I've included links to a pair of matches that display the set in action, but I warn you in advance that they're very, very, very boring.
https://replay.pokemonshowdown.com/gen7ubers-625183583
https://replay.pokemonshowdown.com/gen7ubers-625338243
Gothitelle @ Leftovers
Ability: Shadow Tag
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
IVs: 0 Atk
- Charm
- Rest
- Psyshock
- Calm Mind
...which, for reference, is the same set In The Hills posted a couple months ago. I don't claim to be an expert at these things, but she really seems to have legs. I've included links to a pair of matches that display the set in action, but I warn you in advance that they're very, very, very boring.
https://replay.pokemonshowdown.com/gen7ubers-625183583
https://replay.pokemonshowdown.com/gen7ubers-625338243