Dark Link is back and this time he’s fighting another big swordsman. Marth may be skilled with a sword, but he still can’t take down Dark Link. Dark Link’s skills are formidable and while he doesn’t have as much experience as Marth, I dare say he’s stronger and faster. Marth’s slashes never had much power behind them. Dark Link wins.

Update 2/7/2019 thanks to Fire Emblem Warriors Marth is strong and fast enough where he can turn the tides of battle and win. Marth wins.