Hi im new, and I was just wondering I already have an acekard working and fully operating on my 3DS 2.2.0-0 and would be able to update the it on my 3DS or would I still need another DS?

It is working with my 3DS now but of course I am going to have update soon when new games are released, would I still need another DS to update the acekard.

If the card still works on your 3DS you can update it on that as well. As long as the card works, you can update it. Just be sure to update the card before the 3DS whenever a new update comes out.