"And you as well." is a pretty standard reply. If you're pretending you're suave (in a situation where you might meet someone's parents)you would say... "The pleasure is all mine." Lastly my personal favourite, if you want to sound full of yourself and like a jerk you say... "It's always a pleasure to meet me." (I don't suggest using this one!)

Totally agree with Toby. The best answer for Pleased to meet you is The pleasure is all mine.