Level 20.
Level 20
Magicarp evolves at level 20.
lvl 20 brudda
Magicarp evolves into Gyarados at level 20
Magicarp evolvesw into gyarados at level 20
graveler doesnt evolve at a level, you evolve it by trading.
Level 18
level 30
level 28
Level 55
Your Aron will evolve at level 32 into Lairon.