Affirmative answer for all of your questions. The closest thing i found that looked like a save converter was made on purpose for pokemon G/S/C.Have you Googled around to see if anyone has done something similar in recent times..?
Do you have CFW installed? Are you using the official version of Earthbound from the eShop?
It should be completely trivial to use the standalone 3DS version of SNES9x and just overwrite the save data.
That does not really answer the question.I'm aware of the 3DS version of SNES9x; it was the one i was using before upgrading to the New3dsXL.
I'm curious if it's possible to use the VC title and somehow injecting my old save.