I found a funny Vs. hacking video game of Fire Emblem: Rekka no Ken and The Sacred Stones while I was looking at in YouTube. It is a VS. Hacking Video of Eirika from FE8 vs. Lyn from FE7. The winner of the VS match is Lyn.
“The Female Lords of FE7 and FE8 Clash!”
—Uploader's comment from YouTube