In Pokémon Black 2, Magneton will evolve once it levels up while it is in the Chargestone Cave.
1oo level required.
32
No, it evolves at Mount Coronet found in Sinnoh. Only in Pokemon diamond, pearl and platinum. Now you can also evolve it in Pokemon black and white. Level up a Magneton at Chargestone Cave and Magneton evolves.
Magnetmite evolves at level 30 into Magneton. Magneton can further evolve into Magnezone by leveling up at Mt. Coronet in Pokemon Diamond and Pearl or Chargestone Cave in Pokemon Black and White.
Carracosta does not evolve
In Pokémon Black 2, Magneton will evolve at any level except for Level 100 because it requires leveling it up at least once while in the Chargestone Cave.
Absol doesn't evolve.
narrow the question to a specific Pokemon
Happiny
Vulcurna does not evolve. It is the 2 and final stage.
Only by trade.
Magneton can evolve at any level since it evolves while in the Chargestone Cave, all that's required is to go inside and level up Magneton once and it will evolve into Magnezone.