A team I have been using every generation without change has improved significantly enough to be viable in OU, with two mons possibly being OU tier now up from UU and NU, due to new moves they got.
Frosslass got willow wisp, and when combined with some of her other moves, is wrecking things by totally shutting them down, especially one hit wonders like choice banders or setters.
Froslass @ Leftovers
Ability: Cursed Body
EVs: 252 HP / 252 Spe
Timid Nature
IVs: 0 Atk
- Hex
- Will-O-Wisp
- Disable
- Substitute
She became practically impenetrable, and with 252 in hp, even if a Pheremosa comes in, a direct attack such as from Poison jab will do very little and allow her to burn Phero, while U-turn does negligeble damage.
http://replay.pokemonshowdown.com/gen7pokebankou-492220375
I'm still playing with EVs for Bellossom, now that she gots
Quiver Dance, she's been going Toe to Toe with a lot of mons, especially when EV'd for HP and defense. Trying to find if she is as effective offensively EV'd.
Rockium-Z is being tested by Rampardos, with the slower mons of this gen, he's been having a lot of success. Bisharp was the only OU mon on my team(been using him since he was UU). If Eviolite Gothorita hadn't lost Shadow Tag, my team would be menacing in OU, competitive is good, but since I'm testing a foul play, swagger, reflect, rest moveset, it's a bit useless.