I can take the spiritomb and I guess while were at it what do you want for that suicune. Be right back so you have time to think about that suicune I guess. I can also offer multiple things for it or I can give you one of my other two shinnies.I do have a spare copy of my redistributable Shiny Spiritomb, since you asked for one of mine that was redis and isn't chansey; lol.
But you're more than welcome to Suicune/Dialga/what ever you'd like. Suicune was from a time before HG/SS; when I had only XD Gale of Darkness and Colosseum Dogs for sale. But I'll add you and come online with Spiritomb. If you want something else just deny the trade. :)
edit: if you see nothing that interests you that is fine I am slowly bringing in more stuff so I am sure once I get a few more eggs there should be a new shiny.