Level 30.
Magnemite will evolve at Level 30 in Blue Rescue Team.
In Pokémon LeafGreen, Magnemite will evolve into Magneton at Level 30.
30
In pokemon crystal Pigeotto evolve in 36lvl
You have to catch a magnimite first then evolve it also you catch it in the power plant were zapdos is
No, Sneasel cannot evolve in Crystal.
You cannot evolve Misdreavus in Crystal.
It evolves to Magneton at level 30. Then, you can evolve Magneton into Magnezone by leveling it up in Chargestone Cave.
mewtwo can not evolve because he is one of those Pokemon that do not evolve.
it depends on if he is a boy or a girl
Unfortunately Gligar does not evolve in Pokemon Crystal, it only evolves in Pokemon Diamond, Pearl, Platinum, Black and White.
Mareep will evolve at Level 15 in Pokémon Crystal.