29
Druddgigon has only one form, and cannot evolve.
You can catch lower level 30 Druddigon in Dragonspiral Tower.
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
Level 43
Level 64
Throh don't evolve in Pokemon Black and White.
Audino doesnt evolve in Pokemon black and white
Level it to 41 and it will evolve
watchog does not evolve
Virizion does not evolve.
Raticate can not evolve, it is a fully evolved pokemon.
Pokemon evolve when you level them up to a certain level, by trading them, by friendship, or by using stones.