Yes, certain Pokemon can evolve at night (only at night; all Pokemon can evolve during the night except for day-only Pokemon like Espeon) whether holding an item or simply with Max Happiness. These Pokemon can only evolve at night time:
Pokemon who cannot evolve during the night are:
Eevee (To Espeon), Budew, Happiny, Riolu, and Tyrunt.
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It has to hold a razor claw and evolve it at night.
train gligar at night with razor fang then he will evolve into gliscor!
Chimecho is unable to evolve as of Pokemon X and Y. Chimecho does evolve from a Pokemon called Chingling when it's at max happiness and during night time.
you need a razor claw, and give it to him/her at night! :)
To make Eevee evolve into an Umbreon, you have to level it up with high happiness at night.