L> Help Breeding a Pokemon Pal

I would recommend Smogon.com for sets/team building advice, though keep in mind that their metagame is based on Shoddy Battle. Wifi metagame tends to be very different, especially since Rotom forms cannot be used (legally) in Wifi.

The problem with DD Dragonite is that it is inferior to Salamence due to its significantly lower speed. However, Dragonite's main advantage over Salamence is its bulk. Thus, using a bulky Dragon Dance set would be the best way to go if you want your team to be based on Dragonite and not a lead.

Here is one of my old teams that was based on DD Salamence but with the a bulky Dragonite instead. Dragonite hates two things: Steel types and Bulky-waters. This team aims to remove those so that it can sweep.

 Spoiler

Heatran @ Shuca Berry
Ability: Flash Fire
EVs: 4 Atk / 252 SpA / 252 Spe
Nature: Naive (+Spe, -SpD)
- Stealth Rock
- Lava Plume
- Earth Power
- Explosion
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You can use a Metagross lead here instead if you don't want to keep softreseting for a decent Heatran. IMO, Heatran is better because it does a great job of luring bulky Waters so you can Explode on them. It's also a great Scizor counter.

Scizor @ Choice Band
Ability: Technician
EVs: 248 HP / 252 Atk / 8 SpD
Nature: Adamant (+Atk, -SpA)
- Bullet Punch
- U-Turn
- Pursuit
- Superpower
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Scizor makes a great revenge killer and lure for Steel types which Dragonite hates. The idea is to keep U-Turning to scout their team while weakening their switches. Optionally, you could use Forretress here for Rapid Spin, since Dragonite hates Stealth Rock. However, you'll be losing a great revenge killer.

Vaporeon @ Leftovers
Ability: Water Absorb
EVs: 244 HP / 252 Def / 12 Spe
Nature: Bold (+Def, -Atk)
- Surf
- Wish
- Protect
- Roar / Toxic / Hidden Power Electric
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Many Bulky Waters can't get past Vaporeon (though watch out for Suicune since it can set up on you easily). You can use Hidden Power Electric to take out Gyarados, though breeding for it is annoying. Toxic or Roar work just as well.

Magnezone @ Leftovers
Ability: Magnet Pull
EVs: 40 Atk / 252 SpA / 216 Spe
Nature: Naive (+Spe, -SpD)
- Substitute
- Thunderbolt
- Hidden Power Grass
- Explosion
---
Magnezone traps Scizor and other Steel types with Magnet Pull. Getting Hidden Power Grass will be annoying, but it's great for Swampert who otherwise walls you easily.

Gengar @ Life Orb
Ability: Levitate
EVs: 4 HP / 252 SpA / 252 Spe
Nature: Modest (+SpA, -Atk)
- Substitute
- Shadow Ball
- Focus Blast
- Pain Split
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Tyranitar and Scizor take out Gengar easily, which is why you use Substitute to watch for their switch in (this is also why the Choice Scarf set sucks. Tyranitar and Scizor will easily dispose of it). Focus Blast will OHKO Tyranitar. Pain Split lets you recover back the HP lost from Life Orb and Substitute. I would try to get Timid nature but yours is Modest so that'll do.

Dragonite @ Leftovers
Ability: Inner Focus
EVs: 248 HP / 56 Atk / 204 Spe
Nature: Adamant (+Atk, -SpA)
- Dragon Dance
- Dragon Claw / Outrage
- Earthquake
- Roost
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Another option is to use the "Double Dragon" strategy. You could use the anti-lead Dragonite set (The anti-lead Dragonite set is the best IMO since it's something that Salamence can't do) to weaken your opponent's counters, allowing DD Salamence to sweep. Remember, Dragonite and Salamence have very similar counters.

Oh thank you for your help. I find that really useful. What is a lead though? http://www.smogon.com/dp/pokemon/starmie - TrickScarf Lead?

I'm assuming lead goes first for the opposing team. So an Anti-lead goes first as well to counter the opposing team's lead? Or do I switch in if I encounter a common lead pokemon?

Yes that's correct. An anti-lead can do several things: prevent Stealth Rock or defeat as many Pokemon before going down (which is what Anti-lead Dragonite aims to do).