you don't need legendaries to catch other legendaries. just get a team of Pokemon around the level of the legendary you are trying to catch. weaken it until it is about to faint, and if you can put it to sleep or paralyze it, do that. then just keep throwing ultra balls until you catch it. just in case you don't catch, i recommend saving right before you start a battle with a legendary.
These are the legendaries in diamond that you can get without any cheats:DialgaUxieMespriteAzelfHeatranRegigigasGiratinaCresseliaRotom
Legendaries cannot be bred. They do not belong to any Egg Group, and therefore cannot produce eggs (they also have no gender in most cases). Without cheating, Legendaries cannot be bred.
Any Pokémon is catchable without the Master Ball, though some-especially Legendaries-are harder than others.
Any Pokémon is catchable without the Master Ball, though some-especially Legendaries-are harder than others.
any of the legendaries.
The legendaries you can catch in Pokemon Ruby without trading or going to an event are Groundon, Rayquaza, Latios, Regice, Regirock, and Registeel.
what do you mean by old
No.
Uh... Im sorry I don't think you can.
Any pokemon but legendaries or other ditto.
you can find legendaries in any map after you've finished all the gyms,dojos and elite four. legendaries will suddenly appear in any map
Mesprit Azelf Uxie Palkia