Here's some strats that you won't find on smogon
NOTE: I use these tactics in UU. These are not guranteed to work in higher grades. So just be aware of that, k? :3
Politoed Lol-Tactic: Okay, for those of you who haven't encountered this set, you better be aware of the existance of this set. Essentially, the moveset you want is:
Surf, Whirlpool, Encore, Perish Song.
The item you want is Grip Claw.
This set essentially works as a great way to counter bulky stallers, slow sweepers, fast sweepers if you're aware of your opponent having poor prediction, and any Pokemon that doesn't have an attack which can easily kill a Politoed.
What you do is use Whirlpool or Encore on the first turn (depending on opponent's prediction) and then use the other (if you started with Encore, you may not need to use Encore. It depends on the set they're running. Using Encore is a safety belt, though, so it is reccomended :3). Then use Perish Song. Stall for 2 turns and switch out on the last. That's why this is a lol-tactic

It's not going to get a guranteed kill all the time (especially if you're opponent is wise to this tactics), so use it wisely.
Electrode Starter: A lot of people will say that Electrode is good for one thing only - Rain Dance Teams. But I'm here to tell you differently. Whether or not you agree with me is your decision, but let's just say I've broken a lot of teams with this starter alone.
The set goes:
Magnet Rise, Taunt, Thunderbolt, Hidden Power (Water)
It should hold a Focus Sash.
Essentially, being the fastest pokemon in the UU has a lot of benefits. Especially considering it can learn Taunt. This means that you can Taunt EVERY pokemon that comes your way before they can set anything up (with the exception of pokemon which are faster than Electrode while holding Choice Scarf and decide to use Trick or Switcheroo on you

).
Magnet Rise and Hidden Power (Water) are there to disrupt the common switch-ins (i.e. EQers).
Thunderbolt is there for a nice STAB move.
This set elminates most of Electrodes type disadvantages (of course, Grass/Poison [most commonly in the form of Venusaur] will have an advantage against this set, among other Pokemon, but the main reason for this opener is to Taunt. Attacking is an option here

).
Shuckle Stall: No one has ever mentioned using Acupressure on a Shuckle on smogon. Which proves that they should only be used as a basic guideline. Essentially, this is a late game set that will work providing you eliminate all of the main problems (Essentially, Pokemon which are immune to poison).
The set is:
Knock Off, Acupressure, Rest, Toxic
The item should be Leftovers. The idea here is very basic. Use Acupressure as much as possible (before Toxic, yes. This is to attempt to increase the stats you want ASAP so you can stall properly). Follow with Toxic. Knock Off can be handy in the early game, causing switch-ins to lose their item. It can also be handy in the lategame when the opponent has more Pokemon than you. Rest is there for the obvious (healing? Duh?

).
For those who don't believe me, fine. After all, I did face off a Toxic Orb + Guts + Swords Dance Ursaring AND a DDing Altaria when all I had left was my faithful Shuckle. I won. Shuckle was my last Pokemon. F*** yeah
Those are some of my more 'unusual' strats. I haven't really got too many too offer, but those should provide some interesting feedback for now :3