Changed the totally-white back layer to a gradient cyan! Much more eye-pleasing, yes?
Here's a neat wallpaper I put together featuring Roxie and every Pokémon she uses within Pokémon Black 2 and Pokémon White 2!
In the Gym Battle against Roxie in the games, she'll have her Koffing and Whirlipede (pictured here in its final form, Scolipede); in the unlockable Challenge Mode, she'll also have a Grimer that knows Mud Slap, so be careful if you were planning on soloing her gym with Magnemite!
Apart from the Gym Battle, you can also encounter Roxie at the Pokémon World Tournament held in Driftveil! She'll come at you with one of two different teams, each consisting of Scolipede, Garbodor, Crobat, Drapion, and Amoonguss; whether her final member is Seviper or Toxicroak depends on which team build she happens to choose. Be careful! If she's using the Seviper build, all her Pokémon will be holding rare berries like the Liechi Berry!
All contents of this image (c) GameFreak, Nintendo, and Ken Sugimori. I don't own anything; I just made it into a wallpaper!