Jolteon does not evolve, but to get a Jolteon you need a thunderstone to evolve an Eevee into Jolteon.
Pachirisu does not evolve :(
Level 10
level 25
at level 20
level 40
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
level 32