Monkey D Luffy could beat Uzumaki Naruto in a fight.

Thank you for your rudeness. With all due respect, this debate is about who would win in a fight. Not which anime is better. In addition, I had asked you to present you argument first. Perhaps since you are new to the site, you don't know how things work on here. Nonetheless, I will go ahead and provide some basic arguments on why I think Luffy could win. So, generally, there are 6 factors determining a character's chances of winning a battle: 1) Brute Strength. Luffy's newest attacks are REALLY, REALLY strong. His Elephant Pistol took out a Kraken which is roughly the size of Nine Tails, and his Elephant Gatling destroyed a ship the size of an island. Naruto is capable of doing similar feats in Sage Mode, but remember that Elephant Pistol and Elephant Gatling are just Gear Third + Armament Haki. I'm sure that combined with Gear Second, those moves would easily outmatch Naruto in terms of brute strength. (Luffy 1, Naruto 0) 2) Intelligence Luffy is a combat genius capable of coming up with creative new moves and techniques in the middle of an intense battle. However, I will admit that Naruto is much more capable of coming up with plans, whereas Luffy almost blindly charges into battle. (Luffy 1, Naruto 1) 3) Speed When Luffy is in Gear Second, he is able to move so fast that he almost seems to be invisible. However, Naruto is just as fast in Kyuubi Mode, keeping up with the fastest person in the Shinobi World (4th Raikage). This would make Naruto the fastest person in his own series, whereas Luffy's speed isn't really anything special compared to other characters in his series. Therefore, it is only logical to say that Naruto is at least slightly faster than Luffy. (Luffy 1, Naruto 2) 4) Reflexes Luffy has Observation Haki and is capable of dodging almost all long range attacks, such as super-fast Pacifista beams and bullets shot at point blank range. This would imply that Luffy could easily dodge Naruto's Rasengan, which happens to be Naruto's favorite attacks to use in battle. Naruto has shown no sign of above average reflexes throughout the show. (Luffy 2, Naruto 2) 5) Durability Both Luffy and Naruto have been shown to do amazing things when pushed to the limits of their strength. Neither of them has ever given up in battle due to fatigue. This shows that both of them have extraordinary willpower of about the same level. However, in addition to that, Luffy has Armament Haki which serves as an extremely durable armor for pretty much his entire body. He has been shown to break steel with his head when coated with Haki. Luffy is probably a bit more durable than Naruto. (Luffy 3, Naruto 2) 6) Special Advantages over Specific Opponent First of all, let's assume that they are fighting in some random plain grassland somewhere with no interruptions at all, for the purposes of having a fair fight. Luffy has a weakness to water, but Naruto is not a water chakra-type, so he can't really exploit that weakness in Luffy. Naruto can also use the Shadow Clone Jutsu to make exact copies of himself that can be used in battle. However, it is a known fact that the more clones he makes, the less strong each of them are. I believe Luffy could easily counter this attack because 1) numbers have never fazed Luffy, as shown during the Ennies Lobby Arc, and 2) Luffy's Haki would allow him to detect which one is the real Naruto. All things considered, neither character has a special advantage over the other. (Luffy 3, Naruto 2) So there you have it. A general analysis of their strengths and weaknesses revealing that Luffy has a slight edge over Naruto and would probably win a battle between the two of them. Of course, keep in mind that this is a very broad analysis and isn't perfectly accurate, as some factors may be slightly more important than others in battle. I look forward to hearing your next argument.