So I tried out Meloetta today with two sets I made that really haven't been talked about much: Sub CM and Chestorest. Both worked quite nicely and I felt they deserve some mention. Do note that I've never invented my own sets before so they probably have some problems:
Sub CM:
Meloetta @ Leftovers
Trait: Serene Grace
EVs: 252 HP / 136 SAtk / 120 Spd
Modest Nature
- Substitute
- Calm Mind
- Psyshock/Psychic
- Focus Blast
Because Meloetta falls prey to status, a Sub CM set is viable to prevent Meloetta from being affected so easily by Thunder Wave and Toxic. This set just needs a boost or two and can break some slower attackers like Ttar
Calm Mind and Substitute are the crux of the set. Psyshock is recommended so Meloetta can deal with Special Walls like Blissey and Jellicent as well as letting it deal with opposing CMers like Reuniculus and Suicune. Psychic is always an option if you want more power or you want a better way to deal with Gliscor. Focus Blast is used in the last slot, due to the fact that it gives necessary coverage to beat steel and dark types who would otherwise wall this set. Leftovers are used over Life Orb so Meloetta can set up multiple Subs.
The EVs can be changed around as you want, but 252 HP is necessary to make 101 HP subs, which will prevent it from being instantly broken by Seismic Toss. At least 120 Speed puts you at 246+ speed, which is needed to outspeed the many supporters that run 245 speed, as well as all Ttars besides Scarf. The remaining EVs are in Sp Atk, which, alongside a Modest nature, guarantee KOs on all Ttars bar Sp Defensive after one CM, though Sp Defensive is KOed after a layer of Spikes or Stealth Rock, which isn't as easy to accomplish with a 252/4/252 Timid spread.
ChestoRest:
Meloetta @ Chesto Berry
Trait: Serene Grace
EVs: 252 HP / 252 Def / 4 SDef
Bold Nature
- Calm Mind
- Psychic/Psyshock
- Rest
- Focus Blast
Unlike the other set, this set involves gaining multiple boosts, becoming very bulky and powerful, Rest of any damage and Status, and then destroy the foe. It's no ChestoRest Volcarona, though Meloetta's bulk can help allieviate the issue of not outspeeding many mons.
Calm Mind, Rest, and the Chesto Berry are the crux of the set. The attacking moveset is the same as the last set.
In order to obtain a lot of boosts, heavy investment in Defense is needed so Meloetta can take at least a few hits. Since Meloetta has Rest, it's not as crucial to outspeed supporters, though some Ttars can still outspeed this set without a scarf.
And about the tiering of Meloetta: I don't feel Meloetta is exactly OU material due to technically being outclassed by other Psychic OU mons, yet I feel Meloetta will be a bit too strong for UU, though I never tested it in UU. I'd say Meloetta will probably be BL.