This is a team I made today, and I've had some moderate success with it, but I feel it needs a fair bit of work in order to be even more successful, so that's why I'm here.
The Team
Infernape (M) @ Life Orb
Trait: Blaze
EVs: 212 Atk / 80 SAtk / 216 Spd
Naive Nature (+Spd, -SDef)
- Overheat
- Close Combat
- Mach Punch
- Flare Blitz
My main attacker. This physically-based mixed Infernape is very good. Overheat is a powerful attack, even without full EV investment. Close Combat and Flare Blitz make up Infernapes physical STABs, while Mach Punch is there for priority. 212 Attack EVs for physical power, which is what it will rely on moreso than special. 80 SpA EVs to give Overheat power, with the rest of the EVs dumped into Speed
Gyarados (M) @ Leftovers
Trait: Intimidate
EVs: 176 HP / 128 Atk / 204 Spd
Jolly Nature (+Spd, -SAtk)
- Dragon Dance
- Waterfall
- Earthquake
- Ice Fang
Gyarados is a powerhouse, being able to do large amounts of damage to the opposing team. For this set, I took the EVs from Smogons Bulky Dragon Dance set, but gave it a more offensive moveset. Waterfall is a powerful STAB, Earthquake is to hit Ferrothorn and other things that resist Earthquake, and Ice Fang is to hit Dragons. 176 HP EVs gives Gyarados nice bulk which lets it take hits fairly well, which works well with Intimidate, letting it come in on resisted and neutral physical hits often. 204 Speed lets Gyarados outspeed base 115 Speed foes after a Dragon Dance, and 128 Attack EVs so Gyarados can dish out respectable amounts of damage, even without a Dragon Dance.
Dragonite (M) @ (No Item)
Trait: Multiscale
EVs: 252 HP / 44 Atk / 212 Spd
Jolly Nature (+Spd, -SAtk)
- Dragon Claw
- Fire Punch
- Dragon Dance
- Roost
Bulky Dragon Dance Dragonite was my favourite Pokemon to use in OU a few months ago, and I'm sad to say it doesn't hold up quite as well as it used to, but it can still do an alright job when it sets up. Dragon Dance boosts Speed and Attack in one go, Dragon Claw and Fire Punch have neutral coverage on everything except Heatran, and Roost restores health, letting Dragonite last longer. Maximum HP EVs for bulk, 212 Speed EVs lets it outpace several threatening Pokemon after a Dragon Dance, and the rest of the EVs dumped into Attack.
Bronzong @ Leftovers
Trait: Levitate
EVs: 252 HP / 80 Atk / 84 Def / 92 SDef
Sassy Nature (+SDef, -Spd)
- Stealth Rock
- Gyro Ball
- Earthquake
- Toxic
Bronzong is my Stealth Rocker and defensive wall, being able to take physical and special attacks fairly well. Gyro Ball is Bronzong's main attack, which can do lots of damage to anything moderately fast. Earthquake OHKOs most, if not all Magnezone variants, and Toxic is to wear down defensive threats. Max HP, 84 Def, and 92 SpD give Bronzong lots of bulk, while 80 Attack EVs allow Gyro Ball and Earthquake to do more damage.
Starmie @ Leftovers
Trait: Natural Cure
EVs: 252 HP / 4 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Scald
- Psyshock
- Rapid Spin
- Recover
Defensive Starmie is my Rapid Spinner, helping preserve Dragonite's Multiscale, and letting Gyarados and Dragonite switch in more often. Max HP gives Starmie reasonable bulk, max Speed lets it outspeed a number of threats, such as max base 110 Speed Pokemon like Gengar. Scald is one of Starmie's STAB attacks, which has a chance to burn, crippling physical sweepers. Psyshock is Starmie's other STAB, letting it beat Fighting and Poison types, while also doing nice damage to Pokemon heavily invested in SpD and little physical defence. Rapid Spin is to remove Stealth Rock and other entry hazards, helping my team last longer, and Recover is so Starmie can last longer.
Scizor (F) @ Choice Band
Trait: Technician
EVs: 240 HP / 252 Atk / 16 SDef
Adamant Nature (+Atk, -SAtk)
- Bullet Punch
- U-turn
- Superpower
- Pursuit
Choice Band Scizor is insanely powerful, and a great revenge killer. Bullet Punch is priority STAB, which also gets boosted by Technician. U-Turn is to deal powerful STAB damage and to scout movesets. Superpower is to beat Tyranitar, and Pursuit is to trap opposing Psychic types. Max Attack with an Adamant nature is to give Scizor maximum power, which 240 HP and 16 SpD EVs are for bulk.
Looking at the team, I've noticed a few key weaknesses offensively. I have no answers to many bulky Water types, other than Bronzong's Toxic. There are a few weak links in the team, namely Dragonite and Starmie. Playing with the team, they didn't do a lot, often not being brought in the entire match.
Thank you in advance for your advice and tips, and sorry if any of this seems nonsensical or I've forgotten something, as it is midnight as I'm typing this and I'm pretty tired.
The Team

Infernape (M) @ Life Orb
Trait: Blaze
EVs: 212 Atk / 80 SAtk / 216 Spd
Naive Nature (+Spd, -SDef)
- Overheat
- Close Combat
- Mach Punch
- Flare Blitz
My main attacker. This physically-based mixed Infernape is very good. Overheat is a powerful attack, even without full EV investment. Close Combat and Flare Blitz make up Infernapes physical STABs, while Mach Punch is there for priority. 212 Attack EVs for physical power, which is what it will rely on moreso than special. 80 SpA EVs to give Overheat power, with the rest of the EVs dumped into Speed

Gyarados (M) @ Leftovers
Trait: Intimidate
EVs: 176 HP / 128 Atk / 204 Spd
Jolly Nature (+Spd, -SAtk)
- Dragon Dance
- Waterfall
- Earthquake
- Ice Fang
Gyarados is a powerhouse, being able to do large amounts of damage to the opposing team. For this set, I took the EVs from Smogons Bulky Dragon Dance set, but gave it a more offensive moveset. Waterfall is a powerful STAB, Earthquake is to hit Ferrothorn and other things that resist Earthquake, and Ice Fang is to hit Dragons. 176 HP EVs gives Gyarados nice bulk which lets it take hits fairly well, which works well with Intimidate, letting it come in on resisted and neutral physical hits often. 204 Speed lets Gyarados outspeed base 115 Speed foes after a Dragon Dance, and 128 Attack EVs so Gyarados can dish out respectable amounts of damage, even without a Dragon Dance.

Dragonite (M) @ (No Item)
Trait: Multiscale
EVs: 252 HP / 44 Atk / 212 Spd
Jolly Nature (+Spd, -SAtk)
- Dragon Claw
- Fire Punch
- Dragon Dance
- Roost
Bulky Dragon Dance Dragonite was my favourite Pokemon to use in OU a few months ago, and I'm sad to say it doesn't hold up quite as well as it used to, but it can still do an alright job when it sets up. Dragon Dance boosts Speed and Attack in one go, Dragon Claw and Fire Punch have neutral coverage on everything except Heatran, and Roost restores health, letting Dragonite last longer. Maximum HP EVs for bulk, 212 Speed EVs lets it outpace several threatening Pokemon after a Dragon Dance, and the rest of the EVs dumped into Attack.

Bronzong @ Leftovers
Trait: Levitate
EVs: 252 HP / 80 Atk / 84 Def / 92 SDef
Sassy Nature (+SDef, -Spd)
- Stealth Rock
- Gyro Ball
- Earthquake
- Toxic
Bronzong is my Stealth Rocker and defensive wall, being able to take physical and special attacks fairly well. Gyro Ball is Bronzong's main attack, which can do lots of damage to anything moderately fast. Earthquake OHKOs most, if not all Magnezone variants, and Toxic is to wear down defensive threats. Max HP, 84 Def, and 92 SpD give Bronzong lots of bulk, while 80 Attack EVs allow Gyro Ball and Earthquake to do more damage.

Starmie @ Leftovers
Trait: Natural Cure
EVs: 252 HP / 4 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Scald
- Psyshock
- Rapid Spin
- Recover
Defensive Starmie is my Rapid Spinner, helping preserve Dragonite's Multiscale, and letting Gyarados and Dragonite switch in more often. Max HP gives Starmie reasonable bulk, max Speed lets it outspeed a number of threats, such as max base 110 Speed Pokemon like Gengar. Scald is one of Starmie's STAB attacks, which has a chance to burn, crippling physical sweepers. Psyshock is Starmie's other STAB, letting it beat Fighting and Poison types, while also doing nice damage to Pokemon heavily invested in SpD and little physical defence. Rapid Spin is to remove Stealth Rock and other entry hazards, helping my team last longer, and Recover is so Starmie can last longer.

Scizor (F) @ Choice Band
Trait: Technician
EVs: 240 HP / 252 Atk / 16 SDef
Adamant Nature (+Atk, -SAtk)
- Bullet Punch
- U-turn
- Superpower
- Pursuit
Choice Band Scizor is insanely powerful, and a great revenge killer. Bullet Punch is priority STAB, which also gets boosted by Technician. U-Turn is to deal powerful STAB damage and to scout movesets. Superpower is to beat Tyranitar, and Pursuit is to trap opposing Psychic types. Max Attack with an Adamant nature is to give Scizor maximum power, which 240 HP and 16 SpD EVs are for bulk.
Looking at the team, I've noticed a few key weaknesses offensively. I have no answers to many bulky Water types, other than Bronzong's Toxic. There are a few weak links in the team, namely Dragonite and Starmie. Playing with the team, they didn't do a lot, often not being brought in the entire match.
Thank you in advance for your advice and tips, and sorry if any of this seems nonsensical or I've forgotten something, as it is midnight as I'm typing this and I'm pretty tired.