Well I know this isn't a big enough streak yet, and I didn't record a video as proof (because my computer is weird with photos), but I finally reached a 50 win streak in Super Singles Subway with TruAnt, Smeargle, and Sigilyph. It feels so good.
Durant (M) @ Choice Scarf
EVs: 252 Atk / 16 Def / 240 Spe
~ Iron Head
After some long time, I finally got my DW Durant ready to go. It's standard and self explanatory, entrains Truant to opponents. Yay.
Smeargle (M) @ Rocky Helmet
Ability: Own Tempo
EVs: 252 HP / 4 Def / 252 Spe
~ Tail Glow
~ Baton Pass
Once the opponent has been Entrained, I usually switch to Smeargle. Unlike traditional Spore and Substitute Baton Pass sets one would normally see on a Smeargle, I simply use it to boost stats and Baton Pass to my third member. Since Tail Glow now only needs 2 turns for full setup instead of 3, it allows Smeargle to survive if there happens to be Stealth Rock + Sandstorm/Hail. Of course, Smeargle happens to be my disposable Pokemon as well, switching in to Volt Switches or if the opponent Explodes. It serves as y fodder and is efficient at doing so. Still, it is great at passing +6 SpA/Spe to my last member. (And it took a really long time to RNG breed this thing in Gen IV.)
Sigilyph (F) @ Focus Sash
Ability: Magic Guard
EVs: 252 SpA; cannot remember the others (oddly placed in HP, Def, SpD, and Spe)
~ Cosmic Power
~ Stored Power
~ Miracle Eye
Enter the beast. At +6 in Def, SpD, SpA, and Spe, this thing is unstoppable. The defensive boosts help it to survive in case the opponent is a SturdySash or Dark type, while the Baton Passed SpA and Spe boosts help it sweep. Cosmic Power is used to give Sigilpyh bulk in case the opponent cannot be immediately KO'd. Stored Power is the crux of the set, because at +6 (x4), even bulky Steel/Psychics fall to its power. Miracle Eye is used to ensure Dark types can be hit, because Air Slash still leaves me vulnerable to Steels/Tyranitar, while HP Fighting leaves me useless against Spiritomb. Additionally, it allows evasive targets to no longer be evasive, a huge bonus. Focus Sash is there so it can survive a crit or OHKO move, in case the opponent was SturdySash or Dark (especially SashDrill Rapidash). And the absolute dealbreaker, Magic Guard helps it survive Stealth Rock, poison/burn, and weather, something most others such as Cloyste or Dragonite can't do. The most important thing is that even if Smeargle is sacrificed, it can still boost and kill by itself with a respectable 390 BP Stored Power after defensive boosts. The defensive Cosmic Power is necessary over Calm mind to ensure that it does not die immediately to physical hits if the foe survives.
Well, there's my team. I'll try to go further and post proof, so wish me luck!
"Time you enjoyed wasting is not wasted time." -T.S. Elliot