You can.'t
You can, though, catch a Magmar (Burnt Tower and Safari Zone) and breed it with another Magmar of the opposite sex, another Pokémon in the same Egg group (HumanShape) or with a Ditto.
Magby evolves by leveling and it'll start to evolve into Magmar at Level 30.
Well you can't find magby you have to breed it with magmar.
Magby is the baby version of the fire Pokemon Magmar. You can find one outside the ironworks in Pokemon Platinum.
in a rockclimb
You get it by capturing a magby in your Pokemon Diamond or Pearl. You do the insertion trick with Pokemon Leafgreen, and you can find Magby on route 227 and on Stark Mountain. In Diamond, Magby have a magmatizer about 5% of the time. In Peral, Magby have a magmatizer about 50% of the time.
If You want to catch magby in Pokemon pearl you have to: Insert a Pokemon leafgreen game in the GBA slot. Goto stark Mountain and search there eventualy you will find a magby if u don't start using pokeradar then u will find it Good Luck<(-_-)>
You'll need to trade from Pokemon White.
Magby is a Fire type pokemon.
Get an egg from ditto and magmar put together, when it hatches u get magby. Easy
Wild Magby occasionally hold them. You can catch Magby at Stark Mountain.
koffing and possible magby
my secret fool