Redux (And Continuation) of Two Adorable Fillies Lost in Canterlot, which author Cyndaquil has graciously let me put my spin on. This is completely their idea, not mine. I just wrote this write there.

After an accident with some untested chemicals, Rainbow Dash and Applejack find themselves changed beyond recognition. With their memories gone as well, these two fillies must work together to find out who they are and where they belong.
Can the magic of friendship transcend appearances and memory? Will Twilight and Co. ever find the two missing Elements?