That is awesome that you and your girlfriend draw together. As an aspiring artist you are going down the right path by exposing your work and critically thinking about it. If you want to learn line work, nothing better to do than practice!
Thanks a lot! It was her idea really. I drew her Piplup, asked her what to draw next and she wanted more. So, I made the suggestion that I would draw them all. I was going to clean and color everything on my own, which would take I'm not sure how long... but she used to do cleanup and coloring, so she's going to take care of that.
I'm going to keep improving myself so I don't have to rely on her as much, but if anything it will bring us closer with a common interest.
I'll have another sketch up later today, maybe two if I get the inspiration.