I'm surprised you don't know this Ivysaur was in Blue, Red, Yellow, Firered and Leafgreen LV. 32
Level 32.
It evolves from Ivysaur at level 32. Just choose Bulbasaur as a starter Pokemon where it's available, evolve it to Ivysaur (it evolves at level 16), and evolve Ivysaur into Venusaur.
Ivysaur will learn sweet scent at level 29 in Pokemon fire red and left green.
Bulbasaur evolves into Ivysaur at level 16 then Venasaur at level 32
same as on any other game ex. bulbasaur into ivysaur at level 16, charamander into charmeleon at level 16 .........................................................................