Does anybody have an action replay code to get already owned pokemon to turn shiny in Pokemon Diamond?

I know how to capture shiny pokemon, but I already have worked a lot on the pokemon I own, and want to turn them shiny. I also only want to turn a few shiny. I have heard of a code for action replay that does this, but I can't find it. Thanks alot to whoever answers this.

Does anybody have an action replay code to get already owned pokemon to turn shiny in Pokemon Diamond?
actually this code comes out 6 months after the basic codes but there is a shiny modifier code

sepal