He doesn't evolve through leveling up. You have to link trade him while he holds the Metal Coat item.
Scyther does not evolve by level. You must trade him while he's holding the metal coat.
Trade it holding a metal coat
Scyther evolves via trade holding a Metal Coat.
You need to Trade Scyther whilst it's holding Metal Coat to evolve it into Scizor.To Recap:Scyther ---> Traded with Metal Coat ---> Scizor
Level 30.
Level 30.
level 28
Level 25
Level 37.
Level 18.
Level 26
at level 40 it should evolve into drapion