level 50 and Zweilous evolves at 64
Dieno evolves into Zweilous starting at level 50 and then into Hydreigon starting at level 64.
It does not evolve by level. You need to give it a sun stone for it to evolve.
The address of the Denio Branch Library is: Parcel #02-601-07, Denio, 89404 0230
Lillipup can evolve at Level 16.
Level it up to level 50, then it will evolve into Zweilous. Level it up to level 64, to evolve it into Hydreigon.
Level it to 41 and it will evolve
Virizion does not evolve.
watchog does not evolve
To evolve Mantyke in pokemon black/white 2 you have to level it up with a remoraid in your party then it will evolve into mantine
at level 31.
In Pokémon Black, Timburr will evolve starting at Level 25.
You can evolve a Gabite by leveling it up to level 48.