Deino will evolve once it reaches Level 50.
hydreigon at level 64
at level 50
lvl 64
When its attack reaches 72.
dieno evolves at level 50
YES at level 41/42
I believe at level 41 but it might be 42
when dos bunnelby evolve
Dieno evolves into Zweilous starting at level 50 and then into Hydreigon starting at level 64.
mew doesn't evolve
cp/mFrom 86-DOS
You will have to wait until more information is put out for that answer. You could also keep lvling your Dieno until it evolves. Pokemon White & Black is a relatively new game... I'm sorry I couldn't give you an answer.