Ok Hmm heres a little guide. Chaining a shiny pokemon sometimes take a lot of time
1.Make sure your pokeradar is set to 'Y'
2.Use a max repel to stop other pokemon intefering
3.Save the game
5.Choose a patch of grass and enter it
6,If not the pokemon your after, soft reset
7.If the pokemon you're after kill it, then select another patch of grass.
8.For different grasses, select ones which are a 4x4 box around you.
9.Go for slow moving grass, instead of the fast moving one
10. Keep doing this. A shiny should appear around 36. A patch should shimmer
If these are no good type chaining pokemon into google and shiny patch into youtube!