PixelMC is now updated to 3.3.5
For 3.3.5 pixelmon download click here

Alternatively you can use the technic launcher which requires less effort! All you have to do is press play for it to update. It can be found at:
Technic Launcher download
The platform URL is:
http://www.technicpack.net/api/modpack/pixelmc-pixelmon-pack