There are two ways you can do it. Get an AR and get the code. Two put Pokemon in daycare one from sinnoh and one from national. I can't make that fore sure tho. I just know it raises your chances.
Sorry, but ya have to manually run around like mad.
...shiny Pokemon are always shiny... ._.
Catch a lot of rihorns, whether their shiny or not. If they're not shiny, run away. (press the buton) Eventually a shiny rihorn will show up and walah!
Luck.
You cant get a shiny eevee on Pokemon platinum unless you have some sort of cheets. NOT TRUE... get a shiny eevee if its the swarm of the day and then just chain them..
well... once you encounter a Pokemon, run, save, and turn off your DS. turn it on again. keep encountering the Pokemon and try it again and again till shiny...
Yes. Apparently it is easier to hatch shiny Pokemon from an egg in Platinum if it's parents are from another country.
On Action Replay press disable Shiny Pokemon.
the chance of getting a shiny Pokemon is 1/8496.
Shiny encounter action replay code for platinum: 12075E52 000046C0.
get Pokemon platinum and fill the pokedex and then get the Pokemon radar, a tool which lets you get shiny Pokemon faster
in action replay ds select wild pokemons are shiny.