What game are you playing? If you can find wild Happiny, grab a bug with compound eyes and thief and just go to town. If you can't find Happiny I can give you a few lucky eggs.
I'm playing Y but it turns out I had a lot less Pokemon that needed to be evolved through level ups than I thought. One more trip through the Cafe should take care of that.
The biggest pain now, however, is playing the dumb minigames to get a bunch of Dawn/Dusk/Shiny/Sun/Moon Stones to evolve the rest of my Pokemon.