Okay, so, I've decided I'll list my NU, RU/LU, and UU teams here. (Those are my best tiers, I'm not very good at OU/Ubers to be honest.)
I know they all need improvements so feel free to criticize as I'm always making improvements on them
And y'all don't make fun of all my choice items, it works for me okay?
NU Team:
Crawdaunt, Focus Sash
Jolly Nature, 252 Attack, 252 Speed
Dragon Dance, Crunch, Waterfall, Superpower
Focus Sash so I can set up a Dragon Dance and do damage, duh.
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Haunter, Choice Scarf
Modest Nature, 252 Sp Attack, 252 Speed
Sludge Wave, Shadow Ball, Psychic, Trick
This should be self explanitory.
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Wartortle, Eviolite
Careful Nature, 252 HP, 168 Defense, 88 Sp Defense
Haze, Substitute, Scald, Rapid Spin
This Wartortle is sort of the spine that holds this team up. Completely needed as a wall, and rapid spin. With a Sawk somewhat relying on Sturdy, and a Crawdaunt relying on Focus Sash, Rapid Spin is essential. Not only that, but an Archeops too.
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Sawk, Choice Scarf (Sturdy ability)
Adamant Nature, 252 Attack, 252 Speed
Close Combat, Ice Punch, Stone Edge, Earthquake
I love this Sawk. One time, in a NU tournament, I was in finals and losing 3-1, and my final pokemon, Sawk, pulled a comeback sweep

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Archeops, Choice Band
Adamant Nature, 252 Attack, 252 Speed
U-Turn, Stone Edge, Earthquake, Head Smash
I love this Archeops, so deadly. The moveset could use a bit of work though, if you have any suggestions, let me know. Stone Edge and U-Turn are definitely staying, though.
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Musharna, Leftovers
Bold Nature, 252 HP, 128 Defense, 128 Sp Defense
Barrier, Calm Mind, Moonlight, Stored Power
Love this set. The ONLY thing that can counter this set is Dark types (which pisses me off btw). But as long as I eliminate the dark types before sending out Musharna, I can almost always sweep with this set.

This set was my other saving grace in a finals for a NU tournament. (Which also got me a 6-0 win despite getting my ass kicked at first)
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RU/LU Team:
Meloetta, Choice Specs
EVs: Modest Nature, 252 Sp Attack, 252 speed, 4 HP
Trick, Psychic, Hyper Voice, Shadow Ball
Aint even gonna explain 'dis.
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Ditto, Choice Scarf
EVs: Lax Nature, 148 HP, 144 Attack, 112 Defense, 104 Speed
If you have any better Ditto EV's, feel free to share. However, since this tier has so many Omastar's, Gorebyss's, Scarfers, you name it, I decided that I couldn't check ALL of them, so instead, I just got a Ditto on my team.
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Medicham, Choice Scarf
EVs: Jolly Nature, 252 Speed, 252 Attack, 4 HP
Hi Jump Kick, Trick, Thunderpunch, Psycho Cut
Medicham is godly in this tier. This moveset should be self-explanitory, I never really use Psycho Cut but the reason I picked it instead of Zen Headbutt was the 100% accuracy. It's also cute when people think they got me by switching in to Slowking when I send out Medicham but I instead go for Thunderpunch since it's obvious they'll do it.

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Rotom-C, Choice Scarf
EVs: Modest Nature, 252 Sp Attack, 252 speed, 252 defense
Volt Switch, Hidden Power Fire, Leaf Storm, Trick
I usually send out Rotom-C when I wanna do reasonable damage. I love abusing Volt Switch and das all.
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Omastar, Focus Sash (Weak Armor Ability)
EVs: Timid Nature, 252 Speed, 252 Sp Attack
Shell Smash, Surf, Ice Beam, Hidden Power Grass
I had to put him on this team. Of course, he doesn't usually SWEEP, but he can do some damn good damage. Normally my lead in case of Stealth Rock.
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Entei, Flame Plate
EVs: Adamant Nature, 252 Speed, 252 Attack
Flare Blitz, Stone Edge, ExtremeSpeed, Sleep Talk
Entei can do severe damage in this tier. That's all I can say, really. If you have a better move than Sleep Talk, go ahead and tell me. But my reasoning behind Sleep Talk is because of those people who like to use Sleep Powder + Quiver Dance Lilligant, I can just send out Entei and take it in. Plus, it's not like there's any other excellent moves to use in that slot, anyway. Unless there was a physical hidden power, then I'd do a Hidden Power Electric for Slowking. But, that isn't the case.
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UU Team:
Sableye, Leftovers
Calm Nature, 252 HP, 120 Defense, 136 Sp Defense
Taunt, Will-o-Wisp, Snarl, Recover
This Sableye is there just to be a troll. Now, if you're asking yourself wtf is Snarl and why is it on my moveset, that is because while I have Will-o-Wisp to check physical attackers, I keep Snarl to check special attackers, because of it's 100% chance to lower the target's Sp Attack by one stage. Overall, this Sableye has outstalled so many pokemon before.
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Chandelure, Choice Scarf
Timid Nature, 252 Sp Attack, 252 Speed
Shadow Ball, Fire Blast, Trick, Energy Ball
If you have any better Chandelure suggestions, tell me. I'd probably go for a life orb and substitute Chandelure, if it wasn't for my paranoia of not outspeeding. But otherwise, this Chandelure is pretty good. The reason why I have a Timid nature rather than Modest, is because a lot of times people try to send out THEIR scarf Chandelure against mine, thinking it'll outspeed, but theirs is modest nature while mine isn't, so I take out theirs.
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Weavile, Focus Sash
Adamant Nature, 252 Attack, 252 Speed
Swords Dance, Ice Shard, Beat Up, Brick Break
My lead, normally. Of course, this has counters, but that's only natural. The point is, if it isn't countered, it does a significant amount of damage, especially when people use a Bronzong lead to set up Stealth Rock, or anything to set up Stealth Rock. Ice Shard is there for pokemon like Crobat, and to Scarfers so that I can atleast do some damage or KO them.
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Mienshao, Choice Scarf (Regenerator)
Adamant Nature, 252 Speed, 252 Attack
U-Turn, Hi Jump Kick, Stone Edge, Aerial Ace
This Mienshao seems practically unbeatable in some of my battles, he is almost ALWAYS one of my final two pokemon not KO'd yet. I love to Switch juggle with him and Raikou, especially since if I U-Turn with him, I can regain health. If the opponent still has a ghost type in, I always use U-Turn so that if they send it out I can switch someone in to get it out. Now, the reason why this Mienshao has Scarf over Band is because of all those pesky scarfed Victini's. I need SOMETHING to counter that.
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Raikou, Choice Specs
Modest Nature, 252 Speed, 252 Sp Attack
Volt Switch, Extrasensory, Thunderbolt, Hidden Power Ice
Raikou is kind of the spine of this team. With outstanding Speed and Special Attack accompanied by Specs, I can do a significant amount of damage with Volt Switch and switch to somebody else. I use Volt Switch with Raikou an average of 5+ times each battle.
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Blissey, Leftovers
Calm Nature, 252 HP, 252 Sp Defense
Softboiled, Seismic Toss, Toxic, Aromatherapy
Now then, no idea why this month Blissey got moved down from OU to UU (on Pokemon Online, atleast) but I'm taking advantage of it for a special wall. Not much else to say.
Now then, as I said, feel free to criticize my sets because I'm open minded to new sets. And if you actually got through all of this, thanks for reading.