While you're exploring Sliph Co, there should be one that the president is holding it. defeat Givoanni and then talk to the president he'll give you a master ball. This is the only Master Ball that is obtainable in the How_do_you_get_master_balls_in_leaf_greenwithout using cheats.
without cheats only 1
No, you cannot.
Get 50 Pokemon...
Yes by migrating it from firered or leafgreen.
You cannot get to island 8 without cheats
You can't
i don't think that there is a way... like i got some on mine but its still kinda a cheat. i got two gameboys, firered, leafgreen, a connector cable, and an action replay. i used the action reply to get 100 masterballs onto my leafgreen account. i gave a masterball to 6 Pokemon on my leafgreen account. i traded them to my firered account on firered i took the masterballs from the Pokemon on leafgreen i gave the Pokemon more masterballs then i traded again i just repeated this over and over until i got 100 masterballs on firered the reason i didnt want to just put the action replay directly with firered was because that account was really powerful and the action replay sometimes messes it up. my leafgreen however, was really weak so it was worth the "risk".
you can do that in cheats
you can only get it by trading a machoke with Nintendo wifi connection
There are no cheats for ANY Pokemon games unless you have a gameshark
Yeah, of course! I finished Pokemon Emerald years ago and I caught the legendary pokémon This was all done without cheats mind you, I only have a Gameboy Color. No cheats. You can catch it, but I suggest buying a few masterballs, it could take a while.
there is no more masterballs in Pokemon platinum but not if you use cheats