You can't. Luckily all unova pokemon can be caught without using a fishing rod.
You will receive it after beating the elite four and defeating Team Plasma.
after beating alder and seeing or catching all Pokemon
You get the fishing rod at your home after the elite four.
by fishing or using surf
you can transfer Pokemon from Pokemon platinum to black and white but you can't trade from black to platinum
in the pokemon league after beating the elite 4 talk to each 5 times them YOU HAVE TO BEAT THE CHAMPION WITHOUT LOOSING 1 POKEMON AND THEN GO TO THE BLACK CITY mart and you can buy master balls
You can't. The right hand side of the map won't open until you defeat Ghetsis in the Castle.
fishing at route 4
go fishing mate :)
yes you do need a fishing pole to catch mitotic in Pokemon black but you cant catch that Pokemon you have to catch the first evolvation and then you train it until in evolve into a mitotic
After beating all the Gym Leaders, complete your pokedex.
you get out the charge stone after beating N