Gaspar is not a pokemon. If you meant Gastly than between lvl 18 to 20.
Girafarig doe's not evolve
it depends on the Pokemon that are evolving
It evolves at level 40.
level 37
Level 34
mightyena doesn't evolve on Pokemon pearl, he doesn't evolve in any Pokemon game!
Buizel evolve at level 26.
evolve snowver at level 40
IT DOESN'T EVOLVE
level 30.
at level 30
level 50
Level 20.
Level 18
at level 14
Level 20
Level 37