Tyranitar obviously...I MEAN GIVE IT A BOW AND VOILA? Right? Guys?
But the 'fairy types' and fake-chus seem to be popular on the choice of what coincides as girly. There's also stuff like Beautifly, and Gardevoir. As well as things you might see Lass', Beauty Trainers, or female Pokefans using.
I'm totally kidding! I'd say Pokemon like Clefairy, Jigglypuff, Munna, and Audino are fairly girly, mostly because they're pink and have a milder nature/personality, which is really stereotypical. However, I know guys that love these Pokemon and I know girls who love some of the "manly" Pokemon so it's all just relative. My dad's favorite Pokemon is Jigglypuff after all XD
Diancie is a Princess Pokemon....uh, there's also Flabebe and its evolutions, Clefairy and Clefable, Audino, Blissey. Dragonair strikes me as rather feminine, and its shiny is pink. Celebi also has a pink shiny. Oh, Spritzee and Aromatisse.
Well, you can always go with what Beauty Trainers use like most normal types, baby types, and now in 6th gen a lot of fairy types. Best way is to see cute or adorable pokemon like Clefairy, Meowth, Glameow, and Skitty. I'm sorry if this doesn't help a lot.