I have been playing Pokemon games since 1998 when they first came out. But this is my first RMT post, so please be gentle. I don't know the exact numbers for the E/V spread of my Pokemon but I know where I put them when I did Super Training. I tried to get Pokemon that could counter types that are popularly used in competitive battling (i.e Fighting, Dragon, Fire and Psychic) as well as those that could cover weaknesses in my team.
My Team
Delphox
E/V: Sp. ATK, Sp. DEF, and HP
Held Item: Charcoal
Ability: Blaze
Moves
Flamethrower
Psybeam
Will-O-Wisp
Grass Knot
Delphox is my number one Pokemon. I designed him to be fairly straightforward. He is also good for covering the weaknesses of other Pokemon in my team. Flamethrower and Psybeam for STAB bonus. Also, Delphox is great for combating poison-types and steel-types to help cover Sylveon's weaknesses. And he can cover Torterra when fighting poison and ice-types. And Grass Knot is there to cover Delphox's weakness to ground, rock and water.
Gyarados
E/V: ATK, Sp. DEF, HP
Held Item: Gyaradosite
Ability: Intimidate/Mold Breaker (mega)
Moves
Waterfall
Ice Fang
Thunder Wave
Earthquake
Gyarados is the powerhouse of my team. Because my Delphox, Honchkrow and Volcarona are all weak to Rock, I felt a good Water-type was necessary. Also, I wanted a Mega Evolution Pokemon that could stand up to other mega evolved Pokemon. Although, Gyarados does not have the highest stats, she can take a hit from a strong Pokemon.
Sylveon
E/V: Sp. ATK, Sp. DEF, HP
Held Item: Lax Incense
Ability: Cute Charm
Moves
Moonblast
Shadow Ball
Reflect
Swift
Sylveon is a special sweeper on my team. I use her to take advantage of the great defensive capabilities of the Fairy-type. I have her mostly because Dragon-types and Fighting-types are so popular. And Reflect can bolster Sylveon’s below-average defense. There are few counters to Fairies and I thought a strong fairy-type would be needed on any team.
Honchkrow
E/V: ATK, Speed, HP
Held Item: Wide Lens
Ability: Insomnia
Moves
Night Slash
Fly
Double Team
Steel Wing
Honchkrow, like Delphox, is fairly straightforward. I have him holding a Wide Lens to raise the accuracy of Fly and Steel Wing. Steel Wing protects against Ice, Rock and Fairy-types. I also use Honchkrow to counter the popular Fighting and Psychic-types. Also immunity to (Toxic) Spikes and the all-powerful Earthquake is very useful.
Torterra
E/V: ATK, DEF, HP
Held Item: Yache Berry
Ability: Overgrow
Moves
Razor Leaf
Earthquake
Leech Seed
Rock Tomb
Torterra is on my team not only as a physical tank but for a specific reason. I have seen that Wash Rotom and Milotic are popular so I wanted a sturdy grass-type to take them on. His held Yache berry weakens Ice-type attacks for one turn so Torterra can have a chance to attack a water type with an ice move.
Volcarona
E/V: Sp. ATK, Sp. DEF, HP
Held Item: Wise Glasses
Ability: Flame Body
Moves
Flame Thrower
Bug Buzz
Will-O-Wisp
Quiver Dance
Volcarona is on my team as a special sweeper. Also, Bug-types are underrated and can be difficult to deal with when used the right way. I can use him to counter Delphox’s weaknesses as well as take on Dark and Psychic-types. Will-O-Wisp is good for compensating for Volcarona’s low defense.
My Team
Delphox
E/V: Sp. ATK, Sp. DEF, and HP
Held Item: Charcoal
Ability: Blaze
Moves
Flamethrower
Psybeam
Will-O-Wisp
Grass Knot
Delphox is my number one Pokemon. I designed him to be fairly straightforward. He is also good for covering the weaknesses of other Pokemon in my team. Flamethrower and Psybeam for STAB bonus. Also, Delphox is great for combating poison-types and steel-types to help cover Sylveon's weaknesses. And he can cover Torterra when fighting poison and ice-types. And Grass Knot is there to cover Delphox's weakness to ground, rock and water.

Gyarados
E/V: ATK, Sp. DEF, HP
Held Item: Gyaradosite
Ability: Intimidate/Mold Breaker (mega)
Moves
Waterfall
Ice Fang
Thunder Wave
Earthquake
Gyarados is the powerhouse of my team. Because my Delphox, Honchkrow and Volcarona are all weak to Rock, I felt a good Water-type was necessary. Also, I wanted a Mega Evolution Pokemon that could stand up to other mega evolved Pokemon. Although, Gyarados does not have the highest stats, she can take a hit from a strong Pokemon.

Sylveon
E/V: Sp. ATK, Sp. DEF, HP
Held Item: Lax Incense
Ability: Cute Charm
Moves
Moonblast
Shadow Ball
Reflect
Swift
Sylveon is a special sweeper on my team. I use her to take advantage of the great defensive capabilities of the Fairy-type. I have her mostly because Dragon-types and Fighting-types are so popular. And Reflect can bolster Sylveon’s below-average defense. There are few counters to Fairies and I thought a strong fairy-type would be needed on any team.
Honchkrow
E/V: ATK, Speed, HP
Held Item: Wide Lens
Ability: Insomnia
Moves
Night Slash
Fly
Double Team
Steel Wing
Honchkrow, like Delphox, is fairly straightforward. I have him holding a Wide Lens to raise the accuracy of Fly and Steel Wing. Steel Wing protects against Ice, Rock and Fairy-types. I also use Honchkrow to counter the popular Fighting and Psychic-types. Also immunity to (Toxic) Spikes and the all-powerful Earthquake is very useful.

Torterra
E/V: ATK, DEF, HP
Held Item: Yache Berry
Ability: Overgrow
Moves
Razor Leaf
Earthquake
Leech Seed
Rock Tomb
Torterra is on my team not only as a physical tank but for a specific reason. I have seen that Wash Rotom and Milotic are popular so I wanted a sturdy grass-type to take them on. His held Yache berry weakens Ice-type attacks for one turn so Torterra can have a chance to attack a water type with an ice move.

Volcarona
E/V: Sp. ATK, Sp. DEF, HP
Held Item: Wise Glasses
Ability: Flame Body
Moves
Flame Thrower
Bug Buzz
Will-O-Wisp
Quiver Dance
Volcarona is on my team as a special sweeper. Also, Bug-types are underrated and can be difficult to deal with when used the right way. I can use him to counter Delphox’s weaknesses as well as take on Dark and Psychic-types. Will-O-Wisp is good for compensating for Volcarona’s low defense.