First on my White 2, I decided to take Nimbus, my Altaria that i've had since I first played through the game back in October 2012, and Ford, the Tyranitar I just used in the GT challenge, and entered the Elite Four!
I took on Marshal first. I used Dragon Dance against Throh but took a hefty amount from Payback before I killed him. I switched out for Ford against his Sawk to get Sandstorm going, and took a hit switching in Nimbus before I got that out of there. Machamp barely survived an Aerial Ace and killed me with Stone Edge before dying to the sandstorm. I had to Max Revive Nimbus and have Ford be death fodder against his Lucario. Then I used Dragon Dance and swept the rest of his team.
Next was Shauntal. Cofagrigus almost died to Crunch but lived and missed Will-o-Wisp, then she used her Full Restore allowing me to use Screech and kill her. For Gengar she was faster than Nimbus, survived an Aerial Ace and did big damage with two Sludge Bombs but I killed her. Froslass missed with Blizzard twice in a row (first turn I was healing Nimbus). Golurk I switched out to Nimbus for after I remembered she had Hammer Arm, which missed. I 2HKO'ed her with Aerial Ace then Earthquake despite Stone Edge hitting hard. Drifblim missed Thunder and was an easy OHKO with Stone Edge. Chandelure had a critical hit Energy Ball which knocked me low, but I still killed in one hit with Stone Edge (not a big deal, she was locked in because of the Choice Scarf so I could've just brought in Nimbus and used Earthquake).
Then we had Grimsley. Honchkrow avoided a Stone Edge turn one and was faster but died afterward.
Scrafty hit hard against Nimbus with Head Smash as I was using a MooMoo Milk on Ford before I killed him. Krookodile I OHKO'ed with Draco Meteor. Tyranitar hit super hard with Earthquake, while Brick Break left him with a sliver of health. He healed, though, and second time he lived because of his Focus Band! I had to switch in Nimbus, and he used Stone Edge to kill me. I Max Revived Nimbus as he killed me with another Stone Edge, then I killed him. Houndoom survived an Aerial Ace and lowered my Defense with Crunch, so after he was gone I Revived Ford when Bisharp was out…but I lived Night Slash, allowing me to kill him with Fire Blast.
After that was Caitlin. Musharna barely lived a Crunch, even with the BlackGlasses, and hit with Hypnosis, so we both healed. She barely lived again but missed with Hypnosis next turn, which was good for me. Next was Alakazam, and I switched out to Nimbus and almost killed her with Aerial Ace (surprisingly, I was faster than this) then took a hit with Psychic, but she died from the sandstorm. Reuniclus lived with a sliver of health and killed me with Focus Blast, so Nimbus finished that off. Once Gothitelle was out, I used a Revive on Ford as she used Flatter on Nimbus. Then I went back to Ford and ate her Psychic. Gothitelle used Thunderbolt, but I lived and killed her with Crunch. I stayed in with Ford against Gallade just so she could gain a bit more EXP, and Nimbus ate a Leaf Blade like a champ before killing her with Aerial Ace. Metagross barely lived a Fire Blast and killed me with Zen Headbutt, but she died from Life Orb recoil.
Finally we came to the Champion, Iris. Hydreigon was OHKO'ed by Nimbus' Draco Meteor.
Lapras was up next, and she was faster than Ford. She hit with Sing, and Hydro Pump was doing 2/3 with the sandstorm. She killed me with a critical hit, so I had to let Nimbus die as I used a Max Revive. Then she missed with Sing twice in a row as I Revived Nimbus...and missed with Stone Edge. I had to stall her out of Hydro Pumps, but right after she healed from the sandstorm whittling away at her, she lived Stone Edge with around 30%. Then she missed with Sing and I killed her. Very cumbersome!
Salamence was OHKO'ed by Nimbus' Draco Meteor. Aggron barely lived an Earthquake from Nimbus with like a sliver of health, even with the Expert Belt, and killed me from half with Head Smash. I didn't want to risk Ford being slower (which I was), so I Revived Nimbus, and Ford survived a Head Smash with 7 HP. She then missed, and I killed her with Ice Beam. Haxorus I knocked to her Focus Sash with Nimbus' Dragon Claw, and she used Outrage which killed me (and got a critical hit, but it did NOT matter since I was down to half), but she died from the sandstorm.
Finally was Archeops. Not wanting to risk anything, I Revived Nimbus as she missed with Stone Edge. I then stalled her until she was out of Stone Edges, then she hit with Dragon Claw, but I killed her with Stone Edge to win the fight.
And we did make it. Just if you'd like any further proof...
This morning, I did a bit more.
First, I caught a Manectric in Route 3's Hidden Grotto.
Then I received an Archen from one of my many Plume Fossils.
And I caught a Cryogonal in Twist Mountain. HOWEVER, I don't know if that one only applies to BW, where it has a 1% chance in any season other than winter, where in BW2 (which I was playing in case that Cryogonal's level doesn't make it obvious) it has a 5% chance. Posting it anyway.
Finally, I went to Pokéstar Studios and got the strange ending on Red Fog of Terror 3. That motivates me to make more strange endings, haha.