LF: Someone to double evolve my Porygon, will give an Ability Capsule for your troubles

[d/e] I have a perfect Porygon and I would like to trade it so it can reach its ultimate form.

This is what I've thought out:

Me : You

Porygon w/ Upgrade : Any pokemon

Your pokemon : porygon 2

(I quit trade and I put dubious disc onto my porygon 2)

porygon 2 w/ dubious : any pokemon

pokemon w/ ability capsule : porygon z