It depends on what Pokemon u want
to find a ditto go to the route beside canalave and use the pokeradar. to find one shiny look for a different color grass spot.
finding a shiny Pokemon in platinum is the same as any other game... you just have to look in the grass and if your lucky you can spot one... but the chances are really low... there somewhere along the lines of 8126 to 1... so you have to be really lucky to get one... you can also get one by cheating with an action replay... you can also chain for a shiny but its really hard and takes a long time
YOU DON'T REALLY LOOK FOR SHINY POKEMON YOU JUST WALK AROUND IN TALL GRASS (OR ANY OTHER SPOT TO CATCH POKEMON) AND THEN OUT OF THE BLUE A SHINY POKEMON APEARS.
This is wiki answers not a Pokemon blog spot. Go to a Pokemon blog spot for 100% improved results.
If u have the national dex go to the Pokemon manshion and save then keep talking til he mentions a ditto then go out to the garden then one will appear
there is no best spot
You have to go underground and and use the your stylus and touch the screen. if you see shiny dots, then go to the spot where it is and press a. it will say there is a gap and ask you if you want to mine. say yes and dig for your treasure!
just walk into them and they will slide to the next spot
You have to stand next to the spot with an item in the ground. Turn towards the spot with the item in the ground, and click the A button.
first you have to beat the Pokemon leg then you to the same spot you after you catch giratina
Its on the upper rock path first item easy to spot
they randomly come out if ur lukey you will find 1 go on youtube and search it then watch a video until it gives you a code to put in at a certain spot and then do what it tells you to and you will get a Pokemon some are shiny some ain't and you can do it as much as you want to. i got a bunch of shinies this way and i got a free RESHARAM TOO, but it wasnt shiny but hay its a resharam