Level 22.
Ekans evolves lvl 22
Get EKANS! to level 4
lv. 4
Yamna does not evolve in FireRed.
Lickitung does not evolve in FireRed.
Dragonair will evolve at level 55.
Electabuzz is not able to evolve in FireRed.
Rhydon is not able to evolve in FireRed.
pidgeotto will evolve at level 36
Rattata will evolve at level 20.
Ghastly will evolve at level 20.
At level 33.