You can find one if you look a lot at stark mountain
How To Get A Wild Charmander In Pokemon Diamond?
Get an Action Replay and search for it on google like I am. = P
You have to get the national poke dex first then look in the tall grass for one
A wild charmander is impossible, the only ways to get one would be to trade through GTS (only if your pokedex has "seen" one) or migrate one from any of the GBA games through the pal park.
Once you have one (or any of its evolutions), you can freely breed it with a ditto to get as many charmanders as you want
Once you have one (or any of its evolutions), you can freely breed it with a ditto to get as many charmanders as you want
You can not catch charmander unless you migrate it from fire red or leaf green
In the grass