put leaf green in the gba slot then go to stark mountain and search in the grass for them and there is a 50% chance of them holding a magmarizer which can evolve magmar if it is holding it and you trade it
evolve magbe at level 30 evolve magbe at level 30
Breed magmar.
In Pokémon Diamond you can get Magbe by Stark Mountain and Route 227. This Pokémon can be found inside the mountain and in outside areas as well.
You cant i wish you could but you need to trade it over from leaf green :(