I just finished my White version, and I must say, I'm sad it's over. I'm most definately restarting and doing this again, it was fun. Now, for my rating of my team:
Snivy + Evos
I have mixed feelings for Snivy and his line of Vine Snakes. At the beginning, he was a little underwhelming. Herdier did all the work until he learned Leaf Blade; afterwards, he became a useful staller w/ Coil/Leaf Blade/Leech Seed/Giga Drain. Him setting up 4 Coils on Marshall (Fighting E4) was the reason I beat him.
Ranking: Upper Mid
Victini
I know I'm not supposed to rank him, but I will tell what he was good for. When i caught him, his moves sucked, plain and simple. However, thanks to the next gym being Burgh, Levelling couldn't be easier. After he learned Flame Charge, he started seeing more use in my team. Confusion/Flame Charge/Grass Knot/Thunder had decent coverage, and helped when my team needed bulk mostly. If I weren't trying to not use any pokemon from a previous in-game team, I'd most definately use him again on my team.
Ranking: N/A
Scraggy + Evo
Man oh man...I fucking love this thing. Took a little bit to get a fighting attack, but after it did, easily became the MVP of my team. Got a sassy nature with Moxie, so it tooks hits like a pro, dished them back (normally after being boosted by Work Up), and proceed to sweep till his counter showed up. Beat 3 of the E4 members, N, and Ghetsis (who required a helluvaton X-speeds).
Ranking: Top
Tympole + Evos
At first, I thought i was gonna use Panpour on my team, but i forgot to save before i got the monkey and got a careful nature >.> Instead, I caught this little annoying Tadpole. Was a powerhouse at the beginning (Bubblebeam at this level = Great), but after the 3rd gym, he died to everything, and i mean everything. Didn't evolve into Palpitoad till after the 5th gym he was so frail. After he evolved, though, he did pretty decent w/ Scald/Bulldoze. Once he evolved into Seismitoad, OMG...It was the same as Palpitoad, except more HP. Drain Punch at lv.44 helped train it against Audinos, however.
Ranking: Upper Mid
Joltik + Evo
Why are powerhouses so darn frail? When i got Joltik, I had to baby this thing...a lot. Wasn't till after lv.34 (Signal Beam) before it couls actually train on it's own. Once it evolved, it managed to take down the entire 6th Gym by itself w/ Electroweb+Volt Switch. At 7th Gym city, i bought Thunder...GG opponent. Sadly, didn't help against Ghetsis's Hydreigon as much as i thought it would.
Ranking: Upper Mid(Due to lateness of arrival)
Yeah...I never had a permanent 6th member. Had Herdier at the beginning of game, but then he couldn't hit hard enough. Got Unfezeant when i earned Fly, and replaced with Zekrom to take out Reshiram. I will be playing through again, except this time, I am not using any pokemon i used this run. Only certain poke I know I'ma use is Archeops.