Scyther evolves when traded while holding a metal coat.
graveler doesnt evolve at a level, you evolve it by trading.
Level 18
Level 20.
level 30
Level 55
level 28
Your Aron will evolve at level 32 into Lairon.
it does not evolve enymore when it is a blastoise.
24
32
Level 31
Level 25.