sewaddle evolve when you level them up to lv 20
they evolve into swadloon
lv. 20
Sewaddle evolves into Swadloon, which evolves into Leavanny.
Sewaddle becomes level 20 -----> Swadloon gets a level up while holding a Soothe Bell -----> Leavanny is final form
Level 20 it evolves to Swadloon
Pinwheel Forest.
Sewaddle evolves at level 20 into Swadloon. Swadloon evolves into Leavanny with happiness
Sewaddle evolves into Swadloon at level 20. From there, it can evolve into Leavanny with max happiness.
Sewaddle evolves at level 20 into Swadloon.
nbd sewaddle evolves to swadloon at lvl 20 and then to leavanny with happiness
it evolves at level 20
That's easy! I got my Sewaddle 3 days ago she was a level 20 when she evolved into a swadloon.
Weavile does not evolve in Pokemon Black.