A sun team obviously needs the only sun setter in OU: Ninetales. I chose a Overheat+PowerSwap set to annoy set-up sweepers.
Victini is my ultimate favorite sun abuser. Choice Banded V-Create in sun crushes nearly anything that doesn't resist it, and if I switch in on something like Scizor in a rain team, it's too easy to predict a Politoed switching in and use Bolt Strike on it.
Lilligant is the special attacker of the sun team. Leaf Storm can scare away opposing Tyrannitar and Politoed, and it has a rather fast Sleep Powder to put its counters to sle
The last three pokemon were added mostly to add support. Bronzong was my steel type pokemon that could take Dragon type hits for the team. I gave it an Occa Berry to give it no weaknesses at the cost of Leftovers recovery. Kabutops was my Rapid Spinner, and with Swift Swim, he can take on rain teams if the need arises. Finally, as three of my pokemon were weak to ground type attacks, Honchkrow was my final choice, as priority in Sucker Punch took down Scarfed Latios, and it had a ground immunity to help switch in on.
Sadly, my team a lack of healing capabilities, as only Lilligant has access to a healing move, and even so, Healing Wish could only heal one pokemon before Lilligant went down. I looked over some sun teams on the Smogon forums (I set up an account there, but I never received the activation email for it.....). After a while, I noticed that my team was weak to status, so Ninetales was given the option of Safeguard to protect my teams from status (thanks Katakiri from Smogon forums, wherever you are.). I also found a good Healing Wish user in Jirachi (thanks again, Katakiri). With two Healing Wish users, it's easier to heal my sweepers to full health.
Honchkrow wasn't a very good pokemon. Even with the ground immunity, it was awfully slow, and couldn't do anything other than Sucker Punch. As a result, I switched it for Zoroark, who has a slightly weaker Sucker Punch, but makes up for that in other powerful moves such as Dark Pulse and Flamethrower, as well as possessing a much better speed. Zoroark can also bluff a few pokemon for me, such as Ninetales when sun is already up, and Jirachi when Ferrothorn comes in to wall it. It also doesn't possess an irritating Ground weakness, though the lack of an immunity will hinder me.
As good as Kabutops seemed on paper, with its 4x fire resistance and Swift Swim, it never seemed to do that good on the team. Mix that with a ground type weakness and Kabutops just wasn't cut out for the team. As a result, I decided to replace Kabutops with Claydol. Claydol can both set up hazards and/or Rapid Spin to get rid of the hazards, and provided a much needed ground immunity. The only problem now with the team was a lack of good fire resistances, as Ninetales and Victini don't like taking hits despite their good defensive stats.
I decided to take advantage of Zoroark's Illusion ability by pairing him with Cresselia. Katakiri's Jirachi set worked fine, but I wanted to abuse Illusion in some way. Cresselia then came to the team. Amazing 120/120/130 defenses make it so that Cresslia won't miss the lack of a steel type, and Ground immunity also helped. Cresselia lured in Pokemon such as Scizor, Bisharp, and Tyrannitar, all which Zoroark can surprise and destroy with Flamethrowers and Focus Blasts while in Cresselia's guise. Luring in Tyrannitar is a huge boon, too, as getting rid of a powerful weather setter is great for the team.
Claydol's many common weaknesses were biting me more than I can heal. I needed a better hazard setter. As Lilligant and Cresselia were utilizing Healing Wish and Lunar Dance respectively, Forretress came to my mind as a Hazard controller. It could set up rocks, and Sturdy allows it to survive at least one fire type move, rapid spin or set hazards, and switch out. If it needs to set or spin hazards again, Lilligant and Cresselia can sacrifice themselves to bring Forretress back to full health and spin again. I also changed Choice Band Victini into a physically biased mixed Life Orb set.
Edits made during the thread:
I changed Ninetales's set to more of a utility set.
Dugtrio is used over Zoroark. I dislike it's design, so I would've preferred Rhyperior.
Oh yeah, and I apologize for all the Ninetales, Victini, and Lilligant sprites.