scyther evolves when its been traded while holding a metal coat
Scyther can evolve into Scizor when traded while holding a Metal Coat item. Metal Coat isn't a very rare item and can be found held by wild Magnemites.
Qwilfish does not evolve.
Arbok does not evolve.
Sandslash does not evolve.
Gyardos does not evolve.
Ampharos does not evolve in Pokémon HeartGold.
No, Magneton cannot evolve in Pokémon HeartGold.
Corsola does not evolve
No, Sableye does not evolve.
you cant evolve it on heartgold u can only get it in a sinnoh game
Shuckle Doesn't Evolve....
Kangaskan cannot evolve.