if you saved the game before confronting the Pokemon then just turn off your ds and turn on again and try until you catch the legendary if the game is saved after the battle in witch the legendary Pokemon will never return to its hiding place this only works with darkrai if your NOT in a dream at the canalave inn.
By Maplestory:Exactly, but everyone should know this by now, hopefully in the future the game makers let them come backn in the next new pokemon games, Pokemon Black & White 2.
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Well technically, you can't KILL a Pokemon. You can just make it faint. When you make a legendary Pokemon faint, it will be gone until you start a new game.
Every time i did a he was still standing there with a message box saying Reshiram is gazing at "PLAYER"as if to say "try to catch me!" this happens if you faint it or run away.
No. If you haven't saved since then restart and try again, otherwise you missed your shot.
You can not breed legendary pokemon.
It will come and kill you in your sleep. Goodnight