Sorry, missed that one.

Well, there's Seismitoad (final evolution of Tympole), which is a Ground/Water (part of my Black team). In comparison, he's much stronger than Quagsire was, and excluding Samurott (last evolution of Oshawott), he's the strongest Water-type pokemon.

Excadrill (final evolution of Drilbur), a Ground/Steel pokemon, is a very strong and fast sweeper, and with Hone Claws, you can get his attack power to insane levels and near-perfect accuracy. The only drawback is that it has the lowest defense for a Steel type pokemon, but his HP makes up for it.

Leavanny (final evolution of Sewaddle), is one of the best grass pokemon in the game (if not the best). It can destroy Serperior and pretty much any other pure Grass type, given it's very high attack stat and it's Bug/Grass typing. Plus, it's very fast and even though it has 4x weakness to Flying and Fire, it has super effective STAB moves against a lot of types (Dark, Psychic, Ground, Water, Rock, Grass), so you can't go wrong with it.

Krokodile (final evolution of Sandile), it's a Dark/Ground pokemon, who functions as an attack sweeper, which is like the attacker counterpart of Zoroark. It's fast enough to outspeed almost all of it's counterpart types and has a very high attack stat, but you can also use it to set up Torments, Taunts, Thiefs, you name it. Also, it learns Outrage. 

These are the ones I would recommend out of experience.

The hell is Pokerus???

http://bulbapedia.bulbagarden.net/wiki/Pokérus

an infected pokemon can infect others for two days, after that it will still gain the effects of the virus but is no longer contagious. although i think if you put it in the PC boxes the time isn't counted

Pokerus is a rare condition that can happen to any pokemon in your party. While under the effects of Pokerus, you gain double the amount of EV's you would normally earn. Every pokemon in your party will be infected after a couple of battles if any of them catches it.

http://bulbapedia.bulbagarden.net/wiki/Pokerus

Pretty cool actually lol. 

Thanks man, I've already put a Litwick with Pokerus on my box to transfer it to White.

I'm going on a massive EV hunt with my Dragon team, once I send Reshiram to White

Fraxure (level 39) plus Expert Belt plus Rock Tomb = Ice Gym destruction xD.

How do you go about EV training?  Can you give me the ins and outs?  I've been playing since the first game, but my startegy only extends as far as knowing types like sweepers etc. and using moves, natures and types lol.  Never bothered with this EV business, but maybe you can put it plainly...

Well, it's pretty much what I explained before. Each stat has it's own individual Effort Value; whenever you defeat a pokemon, they give some EV's, depending on the stat they're most proficient on (for example, Gastly gives 1 EV on Sp.Atk, Psyduck gives 1 EV on Sp. Def, etc). 

EV's go from 0 to 255. For every extra 4 EV points that you have on any individual stat, you'll have an extra point on that stat when you hit level 100.

This gen, EV training is a bit different than in previous gens. In revious gens, when you'd hit level 100, whatever stats and EV's that you had at that time, would be the permanent stats for that pokemon. This gen, even if you hit level 100, you can continue to gain EV's because stats will be recalculated for the amount of EV's after each battle ends. 

This happened with my Axew. When I was levelling him up, at level 33 he had 80 HP. During the middle of his exp bar, I saw his HP switch to 81 due to EV recalculations.

So this can be a tedious process somewhat, due to having to run away from pokemon proficient in the other 4 stats?  Might be worth it, based on some of the insane stat raising I've been told about.