I HEAVILY Disgree with Luxray being Electric/Dark.
'Lux' is a measurement of Light, and 'Ray' can be attributed to a ray of -light-. Light is opposite of Dark. Luxray's Pokedex states it can view things through X-ray vision; X-ray is a form of electromagnetic wave, which visible light is also an electromagnetic wave. >> With so much association to Light, it really shouldn't be a dark type. But additionally, no "Light" type should be added to accomodate the 'light' aspect. Light and X-rays are electromagnetic waves, so electric type is a fine enough type on it's own.
As for the topic...
Braviary being Fighting/Flying is good; and props to the poster who said "Flying/'MERICA!" Gothitele being Dark/Psychic is a no brainer. Milotic being Water/Dragon would be a wee bit overpowering, but reasonable. Seismitoad and his prevolutions should have been Water/Poison.
I'm strangely fine with Golurk staying as Ghost/Ground...
Just correcting an error- in Pokemon the Dark type refers to underhanded, cheap tactics or evil things. It does not refer to the absence of light.
Official Miror Infinity Leader with his Escavalier http://i.imgur.com/WvefuGH.jpg?1