My first sprite edit was small, but kind of cute.
I replaced Crono's mom with Terra from Final Fantasy 6. I didn't have to change the palette at all, the palette lends itself quite well to the sprite in my opinion, so I didn't change it.
My second sprite edit was a bit more fun, I changed the Imp sprite with a Moogle from Final Fantasy 6. Chopping up happy moogles is fun. That's all there is to it. "Kupo Kupo...Ku....AHHHHHHHGGHHHHHH..." *CHOP*
(pic coming soon, along with downloads)
My third edit is still in the making. I've replaced Crono with a Nu, and am in the process of making him a fully functional character, along with numorous other changes.
I know there not 'real' edits, but hey... the CT hacking scene is just getting started... and Terra can be my mother any day of the week. ^_^