I know you can migrate it from GBA games FR/LG/E/R/S after you get the National Pokedex & catch it via Pal Park
you can also catch it in the grass on route 222
You can capture one in cerulean cave or train a magnemite to level 25.
Magneton is the last evolution form.sorry.
Sorry to tell you this, but you can't evolve magneton on any gameboy advance games only on Pokemon games that have come out after diamond and pearl(including diamond and pearl) have the Pokemon that evolves from magneton.
Did you mean Magneton or Magmar. If it is Magneton or Magmar you have to trade them.
Magneton from the first generation Fossil set is rare, as well as first generation Team Rocket dark magneton and Neo Revelation magneton.
The only way to get Magneton is to evolve a Magnemite.
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.
the easiest way to do so is to get a magnemite in emerald and evolve it in emerald and then transfer it to pal park and do a capture show. then level the magneton up in mt. coronet.
Magneton evolves into Magnezone by leveling up in Mt. Coronet.
Magneton is #82 in the national pokedex, and it is an Electric-Steel type Pokemon.
Magneton and Nosepass
you need to give coronet rock to magneton and go to luminous spring