Link vs Luffy
The Strawhat Crew from the anime One Pieceland near Hyrule and a scouting party goes ahead(Luffy, Zoro, Sanji, and Franky) to check out the area. Along the way they run into the title main character of the LoZ games, Link. Link doesn't trust them so he draws his Master Sword on them. Luffy, excited to fight someone strong, jumps into fight him(much to the annoyance of Zoro, who usually fights the swordsmen).
Round 1: Battle takes place in the field outside Hyrule in OoT. This is Post-time skip Luffy vs the strongest incarnation of Link(and I'll say it right now: None of this Omnipotent triforce buisness. If Link to the Past Link is the strongest, fine. But he can't just use the Triforce to wish them away or something. I'm banning the complete Triforce's wishing capabilities). This is a fight to...well not the death. I'll explain it with...
Round 2: Regardless of who wins round one, both parties will retreat(if Luffy wins, the crew leave for lunch, and if Link wins they bid a tactical retreat) where they both get to heal up. Link, whichever version is the strongest, decides to break out the Four Sword(Yeah I'm giving it to him just so there will be 4 of the Strongest version). Luffy and the others will return and this time it's a 4 on 4 battle that.
CIS is on, I'm giving whichever Link is chosen feats from the SSB Games for kicks, the Straw Hats get anime feats unless they contradict the manga, and standard rules apply. Who wins!? The Hero of Time or the Future Pirate King!?