Pauline is the damsel in the Donkey Kong games. You know — the one running in place at the top of the construction site. Her in-game appearance doesn't look anything like how she's depicted in the official art. Here is how she originally looked:
Shortly thereafter, Nintendo introduced Princess Toadstool as Mario's main squeeze and Pauline vanished. They updated the old Donkey Kong game engine, though, in 1994 and re-introduced Pauline, though she looked different in order to further differentiate her from the princess. This is a widely available image of that version of Pauline:
Quite washed out. In my lameness, I decided to reconstruct her face on Photoshop. I also gave her skin tone. For both these jobs, I borrowed on what the original version of Pauline looked like. This is the result:
Hopefully, this will be the version that gets passed around. It's currently the image for her on her Wikipedia profile, so it should be widely accessible.