Each Pokemon is different and not all evolve because they have reached a specific level (some evolve due to high friendship, being traded, getting an item used on them, etc.). Some Pokemon that evolve through level will evolve between levels 10 and 20, and some may not have their first evolution until the late 30s. Also, not all Pokemon evolve.
If you want a very accurate, satisfying answer, you will need to ask about a specific Pokemon.
== == == == At level 40 it evolves into Rapidashi think you have to get it to level 40
Arbok can not evolve into any other Pokemon. Hope this helps.
It evolves starting at level 24. Raise it from there and once it gains a level, it'll evolve.
Lickitung (sometimes misspelled as Likitung) is a normal type Pokémon. It evolves when it is at the level that it knows the move rollout.
level 55
Azumarill doesn't evolve according to level in Pokémon HeartGold because it's not capable of evolving at all.
level 38 if u ever want to stop it from evolving press b while it is evolving
sentret evolves at level 20 in Pokemon heartgold
Ampharos does not evolve in Pokémon HeartGold.
level 20
level 31
Level 15.
Level 30.
level 30
Level 36
it depends on the Pokemon that are evolving
Well, it depends on what Pokemon it is.