it evolves at level 22
in level 22.
I can't remember, but I think it has to be level 22.
well im not sure but my tailow is level 15 and it still not being able to evolve
it does not evolve
It will evolve at level 36.
he doesnot evolve
Oddish will evolve at Level 21.
tailow evolves on level 22 to swellow which if people think he can evolve he cant so stop trying ya dingbats
It evolves at level 21 or 22, can't remember it exactly :P
U dont get prinpulp in pokemon sapphire!!!
Level 22.
Go to Google and type in the Pokemon you want to know about. You'll get a boat load of information-- I reccommend Bulbapedia. FYI-- Swellow does not evolve. If you meant Tailow evolving to Swellow, the level's 22.