Yes,you can.All you have to do is go the same trail in the tall grass for forty-nine wild encounters.On the forty-ninth encounter,it should be a shiny pokemon.
I'm sorry but you cant capture a trainer's Pokemon without an action replay.
You use an action replay.
You can`t catch it in the wild you need an action replay
You can't.
no
No you cannot.
you can't without an action replay
you don't
not without an action replay and a Pokemon modifier code.
you must have action replay to catch darkrai, it doesn't goes without.
you cant
no you cannot catch arceus in pokemon black without action replay