Level 36
Level 22
sentret evolves at level 20 in Pokemon heartgold
Ampharos does not evolve in Pokémon HeartGold.
Level 30.
level 20
Level 15.
level 31
level 30
Feebas does not evolve by level in Pokemon HeartGold. Feebas evolves when it levels up while it has a maximized beauty condition.
Kabuto will evolve at level 40.
You have to level it up.
Level 18