If you talking about trying to use an Everstone Ditto with Chobomako then yes I actually did try that. I tried, your Foretress+Chobo, Chobo+Chobo and Chobo+Ditto. None gave me a different result.
However, I think the point of changing parents working isn't just based on reg parents and one reg parent+Ditto so I was thinking that maybe having another different, but still Hasty, Ditto might just do the trick. So, if you want to do that then go right ahead. But if I remember correctly, don't different region Dittos stop the Everstone trick from working? I am on mibbit right now if you think chatting would be easier.