Where do you find Ditto

To the right of canalave city in the grass. You have to use the pokeradar and go to the closest spot in the grass that is moving. (It should be sparkling or shiny.)

First fly or swim to Canalave City.go on to Route 218. go to the tall grass and use the pokeradar ( you have to beat the elat four and go to the lab where you got your first starter and your get the upgraded version then go to pal park outside you sould see oak then he will give you pokeradar) when you use it your on grass you might se grass waving and white sparks walk on the white sparkles and you might find it (ditto is really rare on route 218) this awnser is for Pokemon platinum