Staravia evolves at level 34.
Staravia evolves into Staraptor if you give Staravia a Rare Candy at level 33, making it evolve it level 34.
It will evolve at level 48
it will evolve at level 21
Pachirisu does not evolve :(
Arbok does not evolve
level them up
level 44
at level 20
Level 40.
Level 10
level 25
Level 30