So... hi! I just got my National Dex on Platinum and I've been looking forward to build my own team. I've finished my Diamond version, but I didn't went on competitive battling then, as I wanted to get along with Platinum first. After a lot of work and reading, I came up with what you see here. This is the first time I try to make a competitive team and am open to all suggestions. Also, I'm making this team with Pokemon I like. I'm not planning to go into Shoddy Battle with it, nor use it as a specific OU or UU team. I will edit this post when I finish redacting the way I built the team and as I get input from you and my own thoughts, so... off we go!
I will put the role, the name of the Pokemon with its number, the item, the ability, nature, moveset and EV's.
1. Lead/Phazer - Donphan (232) @ Leftovers
STURDY - Nature-to-be-selected
Stealth Rock
Assurance
Rapid Spin
Roar
228 HP, 204 SPD, 78 ATK
Ok, this is pretty much it. If you want additional information, please ask away and I'll be happy to answer whenever I can.
EDIT 1: * Fixed the EV's to show like numbers instead of percentages
I will put the role, the name of the Pokemon with its number, the item, the ability, nature, moveset and EV's.
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1. Lead/Phazer - Donphan (232) @ Leftovers
STURDY - Nature-to-be-selected
Stealth Rock
Assurance
Rapid Spin
Roar
228 HP, 204 SPD, 78 ATK
I choose Donphan as my lead as it has decent endurance to resist the first attack as I set up Stealth Rock, plus enough power to hit with a 100BP Assurance, if the situation arises. It also works as a Phazer and supports Umbreon's Toxic with Roar. Leftovers are there to better improve its survivality early game.
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2. Toxic Wall/Support - Umbreon (197) @ Leftovers
SYNCHRONIZE - Bold Nature (+Def -Atk)
Dark Pulse
Protect
Toxic
Wish
208 HP, 172 DEF, 130 SPDEF

2. Toxic Wall/Support - Umbreon (197) @ Leftovers
SYNCHRONIZE - Bold Nature (+Def -Atk)
Dark Pulse
Protect
Toxic
Wish
208 HP, 172 DEF, 130 SPDEF
Umbreon is a classic wall and a Pokemon I really like. I choose Leftovers to improve its chances to survive until mid game and a Bold Nature to balance both defense stats without diminishing the special attack stat that allows it to hit with a 120BP STABd Dark Pulse in case I face a taunting enemy. It uses Toxic and Protect until attacking or switching out. Wish is there to help out the rest of the team when in a pinch.
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3. Support Physical Sweeper - Scyther (123) @ Life Orb
SWARM - Adamant Nature (+Atk -SpAtk)
Swords Dance
Baton Pass
X-Scissor
Aerial Ace
252 ATK, 182 SPD, 74 HP

3. Support Physical Sweeper - Scyther (123) @ Life Orb
SWARM - Adamant Nature (+Atk -SpAtk)
Swords Dance
Baton Pass
X-Scissor
Aerial Ace
252 ATK, 182 SPD, 74 HP
Scyther is here for two reasons: lay an initial sweep in mid game and support my main Physical Sweeper in late game with Baton Pass the Swords Dance. It can do very decent damage with its two STAB'd moves and a good amount of EV's into the Attack stat, plus Life Orb that can eventually help activate Swarm.
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4. Support Special Sweeper - Dragonite (149) @ Yache Berry
INNER FOCUS - Modest Nature (+SpAtk -Atk)
Dragon Pulse
Surf
Ice Beam
Rain Dance
208 SPD, 204 SPATK, 96 HP

4. Support Special Sweeper - Dragonite (149) @ Yache Berry
INNER FOCUS - Modest Nature (+SpAtk -Atk)
Dragon Pulse
Surf
Ice Beam
Rain Dance
208 SPD, 204 SPATK, 96 HP
This oddly shaped Dragonite, besides being my favourite Pokemon, is here to make a good sweep mid game and support my main Special Sweeper with it's Rain Dance before entering late game.
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5. Main Physical Sweeper - Infernape (392) @ Life Orb
BLAZE - Hasty Nature (+Spd -Def)
Blaze Kick
Close Combat
Earthquake
Grass Knot
252 SPD, 252 ATK, 4 HP

5. Main Physical Sweeper - Infernape (392) @ Life Orb
BLAZE - Hasty Nature (+Spd -Def)
Blaze Kick
Close Combat
Earthquake
Grass Knot
252 SPD, 252 ATK, 4 HP
What you see here is my main physical sweeper in late game because of its fast and hard attacks. It uses STAB'd Fire and Fighting moves, plus Earthquake and Grass Knot to cover more types of Pokemon.
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6. Main Special Sweeper - Mismagius (429) @ Item-to-be-Selected
LEVITATE - Timid Nature (+Spd -Atk)
Calm Mind
Shadow Ball
Thunder
Psychic
252 SPD, 216 SPATK, 40 HP

6. Main Special Sweeper - Mismagius (429) @ Item-to-be-Selected
LEVITATE - Timid Nature (+Spd -Atk)
Calm Mind
Shadow Ball
Thunder
Psychic
252 SPD, 216 SPATK, 40 HP
I've loved Ghost Pokemon since the first time I got my hands on Pokemon Silver back then when I was a toddler. The fourth generation brought me Mismagius, and I fell in love. This Pokemon is supposed to hit hard late game with it's Calm Mind, plus a STAB'd attack, Thunder (with Rain Dance setted up by Dragonite) and Psychic, to cover more types.
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Ok, this is pretty much it. If you want additional information, please ask away and I'll be happy to answer whenever I can.
EDIT 1: * Fixed the EV's to show like numbers instead of percentages