I want to transfer my characters with a few time-sensitive achievements to another account. Does the new account gain the achievements in normal fashion? Does the old one looses the said achievements and rewards?
For example, I have a character that I wish transfer to a different WoW account. The character in question has an “Ahead of the Curve: X” achievement, Keystone Master of particular season, a certain PvP achievement for particular season, and a number of Feats of Strengths for whatever reason.
Will my old account loose access to those? Will my new WoW account gain those? What about associated mounts (for example, for N’zoth heroic or mythic kill) and transmogs (for PvP rating)?
What if I transfer a character to a different Battle.net account instead? What do I gain/lose?
If you mean transfer within your sub accounts wow1, wow2 etc you keep everything . If you move your char out to a different account made under another email you loose everything when you get to the new account, but you keep on the account you made the achievement on.