Korona

I used PokeGen to import a Japanese C-Gear background to my game and it was all glitched up. So I tried to change my skin again through the official Pokemon Global Link, but the graphics are still broken and I don't know how to fix this. I tried different skins over PGL but the problem remains. This hasn't happened before I used PokeGen and I didn't use anything else on my savegame. How do I fix this?