Since there is no Pokeradar in Pokemon White... how do u get a shiny. My brother got a shiny Cubchoo by pure luck, he was about to leave the cave when the shiny Cubchoo appeared and now i want a shiny pokemon.
this might baffle you, but you run around in the grass over and over again. or if it is a pokemon that you can click ( such as Volcorona, Reshiram / Zekrom, and Kyurem ) you can " soft reset ". http://pokemondb.net/pokebase/25640/what-is-a-soft-reset
the other popular way, is to use the " masuda method " http://bulbapedia.bulbagarden.net/wiki/Masuda_method
have fun