Only way to know it they're legit, in-game, is to go to the IV checker (on the Battle Subway) and see if these phrases http://bulbapedia.bulbagarden.net/wiki/Legendary_Top_Pokémon_Breeder equal to the characteristic of your pokemon.

Other than that, you'll need a hacking tool to do it, to check the PID's which are the legit numbers produced in-game for each pokemon. If the pokemon's PID doesn't match the legit value, it has been hacked.

Sounds like a hassle. I got a mew for it. I'm happy.

i'm not too worried about legit or non legit pokemon myself.

if say a legendary is non legit, so be it.  i don't use elgendaries anyway.  any pokemon i use can be bred and in most cases i will breed till i get the nature i want anyway so a non-legit would just be the baby daddy and be released soon anyway

I've only ever had one shiny Pokemon, and that was a Zubat.

There is a glitch when you play Black and White on the 3DS. It has to do with the battery icon not displaying the correct gauge. On my 3DS' Home Screen, it shows that I have 3/4 bars of my battery left, but on my White Version, it shows that the battery is on the last bar before displaying it's empty.

I just wanted to point this out.

That tutorial triple battle was very tough for me, because his team perfectly compensated itself, and i forgot about Blitzle's Flame Charge, lost my Pansage, quit, then lost twenty minutes of play including a caught Pokemon, all of which i had to redo

Eventually what i did was bring in Liepard, Krokorok, and Pignite, and focused on keeping Pignite alive against his Buscinan's and Krokorok's supper-effective moves until Krokorok could kill Blitzle (and i just spun Assist for Liepard, and completely lucked out and got it to use Dig against Blitzle too), then once Blitzle was dead, swapped Pignite out for Pansage to clean up the rest.

Also: Ducklett has good HP growth

Okay so I decided to catch a couple of Axew. Can someone tell me the best one to use, based on stats/abiliy/nature?

1. Level 30

Timid Nature
Rivalry Ablitiy

HP - 76
Att - 52
Def - 47
SP. Att - 25
SP. Def - 35
Speed - 45

(For some reason, attack and speed on this one are highlighted blue and red, respectively)

2, Lvl 31

Hardy Nature
Mold Breaker Ability

HP - 74
Att - 65
Def - 49
Sp. Att - 30
Sp. Def - 29
Speed - 44

... Or should I just catch a few more?

Adamant Rivalry Axew is the best one you could possibily capture. The red colour means that you get increased stats in that specific stat and blue colour means decreased. 

Try to catch a good IV Adamant Rivalry Axew. With proper EV training, it's attack power (on Haxorus) can go all the way to 432. Mine's at level 76 and has 312.

Thanks. I'll go back and catch a few more later until I get the right one. I doubt I'll be doing all the EV Training stuff as I'm not really playing competitively, and if I do it wont be against REALLY good players

Mind if I ask you something about your team? Why Arcanine in with all those dragons?

Because I'm still to decide which Dragon to add to that slot. I don't want to repeat secondary typings, which on Dragons is kinda hard to do, given that most non-legendary typings fall into either Flying or Ground. I may use a Druddigon there, but for now I haven't decided yet.

An Adamant Sheer Force Druddigon with a Life Orb using Fang attacks could potentially be an extremely deadly opponent if EV trained for Attack and Speed, but I haven't found one yet, because I'm currently working on filling the dex.