wooo i just got Pokemon White 2 but i just wanna know if theres any tips or out that could help me out in the game?
Congrats on getting White 2! You're gonna have a great adventure. :D
For starters, I'd recommend you pick Oshawott. You won't regret it. He's a good, strong and solid team member, unless you already have another water type in mind, then pick whichever suits you best.
For Roxie's poison-type gym, catch a Magnemite which can be found the the Complex south of the town. With it, you won't have any trouble defeating this gym, unless you prefer a bit of a challenge and going for it with whatever you already have. ;)
Your team will almost probably be under-leveled before challenging each gym. I'd advise you to go Audino-training in shaking grass quite a lot. Once you get the lucky egg, use it to its full potential with the Audinos! That would definitely help you.
Oh and of course, make sure you have a team with a good variety of types with you. You should already know this, just a friendly reminder. :)
Hmm..I would have probably said a lot of the stuff people here have already said, but this is what I would personally advise you. All the best and remember to enjoy your journey! :D