It does not evolve at a certain level. It evolves when you use a Fire Stone on it.
Only when you use a fire stone on growlithe it will evolve.
level 31
Growlithe are specific to red version and yellow version only. As are oddish
Is not possible to get Growlithe in Pokémon Blue version. The only way to get it is to trade from Red version.
Lvl 20.
mine evolved at lvl. 31
beet the league,get the national pokedex get full friendship then evolve it one level
no but you can trade it from fire red
Personally i would say as soon as you get gloom evolve it.
Growlithe can be found in the Pokemon mansion on Cinnebar Island and on Routes 7&8.
If you mean flareon, then i will tell you. Flareon does not evolve. It evolves using a fire stone and it can't evolve after that.
Sandshrew evolves at level 22 in both fire red and leaf green. But in order to get sandshrew on fire red version, you have to trade it