It evolves into Swellow at level 22
Taillow evolves at level 22.
Train Taillow to level 22
Taillow evolves at Level 22.
A Taillow will evolve arounde level 22.
Taillow evolves into Swellow at level 22 and does not evolve further. Swellow should always know Fly and Steel Wing.
level 22
at level 22.
Level 23. 
level 22
At level 22 it evolves into Swellow.
i think at level 32
It evolves into swellow at level 22