I'm relatively new to competitive battling, but I've been messing around with shoddy recently and I feel it would be best to ask for some advice. The following team has taken a few incarnations, but I'm still having trouble perfecting it (mostly due to my stubborn insistence of using some of my favorite pokes, particularly since I'm sick of seeing the same pokemon all the time). It has had some success, mind you; however, if there is some means of making this team better without having to switch it around too much, I'd like to hear it.
Gliscor @ Leftovers
Ability: Sand Veil
EVs: 248 HP/40 Def/220 Spe
Jolly Nature
-Taunt
-Stealth Rock
-Roost
-Earthquake
I increased his speed investment from 216 to 220 to outrun other Gliscor leads, as the speed tie often screwed me over (and I hardly miss the extra point in HP). I'll taunt if the opponent is slower or Ninjask, then stealth rock on the switch. If the lead is Swampert, I switch immediately to Vaporeon for fear of an ice attack. If I face a trick lead like Azelf, I switch to Tyranitar, which had the added benefit of activating sand stream for when I bring in Gliscor later. He's bulky enough to stall out a lot with roost. Edit: Switched Atk EVs to HP and defense, and it hasn't been a problem so far against lead Metagross. However, kept speed at 220 in case I face other lead Gliscor.
EDIT:
Jirachi @ Choice Scarf
Ability: Serene Grace
EVs: 4 HP/252 Atk/252 Spe
Jolly Nature
-Iron Head
-Thunderpunch
-Fire Punch
-Ice Punch
Replaced Gengar with this after bluewooper's suggestion. Having a second flincher has been proving useful, especially because of the physical attack as opposed to Togekiss's special. Further, as pointed out by bluewooper, it offers me dragon and rock resist, and it has been useful in taking care of Gyarados and Salamence. However, having another fighting weakness is proving to be a problem, which is why I am again wondering if I should get a Rotom forme or even Dusknoir somewhere on the team. As of now, when not threatening Gyarados and Mence, I use Jirachi almost exclusively as a secondary flincher.
Togekiss @ Leftovers
Ability: Serene Grace
EVs: 252 HP/152 SpAtk/104 Spe
Calm Nature
-Air Slash
-Aura Sphere
-Thunder Wave
-Roost
If there is one pokemon to keep, I'd want it to be this one. Flinchkiss is my staple at this point, and I've had one on every team. She can sponge special attacks pretty darn well, and if she gets in a thunder wave then I have a good chance to take out the opponent's poke. Even if the opponent resists air slash, I'll usually stall with it until they're in range for an aura sphere to KO. This can help with TTar, but only if it switches into paralysis, expecting a different 'kiss set. If not, she gets the heck out of there to avoid the KO with stone edge, and it's back to Gliscor. The fact that she annoys opponents to no end and allows me to pull wins out of my ass makes me believe she does her job, so long as I'm not too reckless and know when to switch. However admittedly, stealth rock damage does hinder her ability to stall. Edit: Got rid of the SpDef EVs and put them into Speed and SpAtk. The Speed boost is much appreciated, though the boost in SpAtk seems negligible, and I rather miss not having to worry about Togekiss dying to thunderbolt. I'll see if anything else can be done.
Tyranitar @ Choice Scarf
Ability: Sand Stream
EVs: 4 HP/252 Atk/252 Spe
Jolly Nature
-Rock Slide
-Crunch
-Pursuit
-Earthquake
Originally, he was a DDTar with Babiri Berry and Fire Punch, and thus a great counter to Scizor. While I miss that to some degree, I realized I was having limited success with him, and there have been moments where teams with multiple Trick-users have run through me. Making note of the need for a Trick-absorber and the fact that most Trick users are psychic/ghost, I switched to this set. If I have a feeling Trick is coming, I switch him in and Pursuit for the KO. I toyed with the idea of Choice Band, but I felt I needed the speed boost if I'm in a pinch later. Plus, with earthquake he can KO Infernape, who could run HP Ice and destroy Gliscor. I gave him Rock Slide over Stone Edge for the accuracy and chance to flinch, since he out-speeds a lot with Choice Scarf. Having someone to destroy psychic and ghost types and flee is greatly appreciated, as is the speed; however, if he gets hit with Will-o-Wisp or Thunder Wave, he's dead weight.
Vaporeon @ Leftovers
Ability: Water Absorb
EVs: 188 HP/252 Def/68 Spe
Bold Nature
-Protect
-Wish
-Surf
-Toxic
Realizing Gliscor would attract ice and water attacks from certain leads (Swampert, ice fanged Hippowdon), I threw Vaporeon in as a filler. However, it has proved to be immensely helpful. It can take non-STABed electric attacks, allowing it to stall with wish and protect. It can toxic something on the switch and then, depending on the pokemon, sit and absorb attacks. If I know a water attack is coming and I haven't yet revealed Vap, I'll switch it in to recover any spikes/stealth rock damage. It is effectively my main, and perhaps only, method of dispatching bulky water types, and the ability to take ice and water attacks helps Gliscor, Togekiss, and Tyranitar. From my experience, she can get Toxic on Rotom-A, making it easier for TTar to KO it before getting hit with will-o-wisp.
Snorlax @ Leftovers
Ability: Thick Fat
EVs: 168 HP/120 Def/220 SpDef
Careful Nature
-Body Slam
-Fire Punch
-Curse
-Rest
Originally, he was Scizor. However (here especially is where my stubbornness comes in), Scizor is everywhere. It rather annoys me to the point where I insisted on using Curselax, who in general is one of my favorite pokemon. I don't reveal him until late in the match if I can help it, when hopefully TTar has revealed the opponent's fighting types so I can dispatch them and thus use Snorlax at my leisure. If I know status is coming that would cripple an earlier teammate, I'll throw him in as a sponge. If it's very early in the fight, I body slam as the opponent switches, hopefully paralyzing the switch in (which is most useful if the opponent has pokemon that Togekiss's thunder wave can't hit). If it's mid-game, I'll Curse to test my ground, and switch out if faced with a fighting type (to Vap or Gliscor). If I can eliminate enough threats, Snorlax can sweep. Fire Punch is to hit both ghosts and steels.
Threats:
This is where you come in.
Machamp gives me no end of trouble; ice punch against Gliscor, and having three pokemon weak to fighting is a big problem. Dynamic Punch's confusion is also a big problem if I try to stall with Vaporeon.
DD Kingdra has been a problem, with my only means of taking care of him so far being to switch in Lax and start Cursing as he DDs. I can stall somewhat this way by resting in-between, but this is not the best way to take care of him as Outrage can end me, leaving me with only the option of sending in Jirachi, whose attacks won't be able to KO.
SD Scizor is also a pain if Jirachi is gone and I don't get Gliscor out in time, but I don't know if I can do anything about that except try to keep Jirachi alive.
I would appreciate more suggestions, or blunt honesty saying that there is simply no way to make this team great.
Gliscor @ Leftovers

Ability: Sand Veil
EVs: 248 HP/40 Def/220 Spe
Jolly Nature
-Taunt
-Stealth Rock
-Roost
-Earthquake
I increased his speed investment from 216 to 220 to outrun other Gliscor leads, as the speed tie often screwed me over (and I hardly miss the extra point in HP). I'll taunt if the opponent is slower or Ninjask, then stealth rock on the switch. If the lead is Swampert, I switch immediately to Vaporeon for fear of an ice attack. If I face a trick lead like Azelf, I switch to Tyranitar, which had the added benefit of activating sand stream for when I bring in Gliscor later. He's bulky enough to stall out a lot with roost. Edit: Switched Atk EVs to HP and defense, and it hasn't been a problem so far against lead Metagross. However, kept speed at 220 in case I face other lead Gliscor.
EDIT:
Jirachi @ Choice Scarf

Ability: Serene Grace
EVs: 4 HP/252 Atk/252 Spe
Jolly Nature
-Iron Head
-Thunderpunch
-Fire Punch
-Ice Punch
Replaced Gengar with this after bluewooper's suggestion. Having a second flincher has been proving useful, especially because of the physical attack as opposed to Togekiss's special. Further, as pointed out by bluewooper, it offers me dragon and rock resist, and it has been useful in taking care of Gyarados and Salamence. However, having another fighting weakness is proving to be a problem, which is why I am again wondering if I should get a Rotom forme or even Dusknoir somewhere on the team. As of now, when not threatening Gyarados and Mence, I use Jirachi almost exclusively as a secondary flincher.
Togekiss @ Leftovers

Ability: Serene Grace
EVs: 252 HP/152 SpAtk/104 Spe
Calm Nature
-Air Slash
-Aura Sphere
-Thunder Wave
-Roost
If there is one pokemon to keep, I'd want it to be this one. Flinchkiss is my staple at this point, and I've had one on every team. She can sponge special attacks pretty darn well, and if she gets in a thunder wave then I have a good chance to take out the opponent's poke. Even if the opponent resists air slash, I'll usually stall with it until they're in range for an aura sphere to KO. This can help with TTar, but only if it switches into paralysis, expecting a different 'kiss set. If not, she gets the heck out of there to avoid the KO with stone edge, and it's back to Gliscor. The fact that she annoys opponents to no end and allows me to pull wins out of my ass makes me believe she does her job, so long as I'm not too reckless and know when to switch. However admittedly, stealth rock damage does hinder her ability to stall. Edit: Got rid of the SpDef EVs and put them into Speed and SpAtk. The Speed boost is much appreciated, though the boost in SpAtk seems negligible, and I rather miss not having to worry about Togekiss dying to thunderbolt. I'll see if anything else can be done.
Tyranitar @ Choice Scarf

Ability: Sand Stream
EVs: 4 HP/252 Atk/252 Spe
Jolly Nature
-Rock Slide
-Crunch
-Pursuit
-Earthquake
Originally, he was a DDTar with Babiri Berry and Fire Punch, and thus a great counter to Scizor. While I miss that to some degree, I realized I was having limited success with him, and there have been moments where teams with multiple Trick-users have run through me. Making note of the need for a Trick-absorber and the fact that most Trick users are psychic/ghost, I switched to this set. If I have a feeling Trick is coming, I switch him in and Pursuit for the KO. I toyed with the idea of Choice Band, but I felt I needed the speed boost if I'm in a pinch later. Plus, with earthquake he can KO Infernape, who could run HP Ice and destroy Gliscor. I gave him Rock Slide over Stone Edge for the accuracy and chance to flinch, since he out-speeds a lot with Choice Scarf. Having someone to destroy psychic and ghost types and flee is greatly appreciated, as is the speed; however, if he gets hit with Will-o-Wisp or Thunder Wave, he's dead weight.
Vaporeon @ Leftovers

Ability: Water Absorb
EVs: 188 HP/252 Def/68 Spe
Bold Nature
-Protect
-Wish
-Surf
-Toxic
Realizing Gliscor would attract ice and water attacks from certain leads (Swampert, ice fanged Hippowdon), I threw Vaporeon in as a filler. However, it has proved to be immensely helpful. It can take non-STABed electric attacks, allowing it to stall with wish and protect. It can toxic something on the switch and then, depending on the pokemon, sit and absorb attacks. If I know a water attack is coming and I haven't yet revealed Vap, I'll switch it in to recover any spikes/stealth rock damage. It is effectively my main, and perhaps only, method of dispatching bulky water types, and the ability to take ice and water attacks helps Gliscor, Togekiss, and Tyranitar. From my experience, she can get Toxic on Rotom-A, making it easier for TTar to KO it before getting hit with will-o-wisp.
Snorlax @ Leftovers

Ability: Thick Fat
EVs: 168 HP/120 Def/220 SpDef
Careful Nature
-Body Slam
-Fire Punch
-Curse
-Rest
Originally, he was Scizor. However (here especially is where my stubbornness comes in), Scizor is everywhere. It rather annoys me to the point where I insisted on using Curselax, who in general is one of my favorite pokemon. I don't reveal him until late in the match if I can help it, when hopefully TTar has revealed the opponent's fighting types so I can dispatch them and thus use Snorlax at my leisure. If I know status is coming that would cripple an earlier teammate, I'll throw him in as a sponge. If it's very early in the fight, I body slam as the opponent switches, hopefully paralyzing the switch in (which is most useful if the opponent has pokemon that Togekiss's thunder wave can't hit). If it's mid-game, I'll Curse to test my ground, and switch out if faced with a fighting type (to Vap or Gliscor). If I can eliminate enough threats, Snorlax can sweep. Fire Punch is to hit both ghosts and steels.
Threats:
This is where you come in.
Machamp gives me no end of trouble; ice punch against Gliscor, and having three pokemon weak to fighting is a big problem. Dynamic Punch's confusion is also a big problem if I try to stall with Vaporeon.
DD Kingdra has been a problem, with my only means of taking care of him so far being to switch in Lax and start Cursing as he DDs. I can stall somewhat this way by resting in-between, but this is not the best way to take care of him as Outrage can end me, leaving me with only the option of sending in Jirachi, whose attacks won't be able to KO.
SD Scizor is also a pain if Jirachi is gone and I don't get Gliscor out in time, but I don't know if I can do anything about that except try to keep Jirachi alive.
I would appreciate more suggestions, or blunt honesty saying that there is simply no way to make this team great.