Deadpool was currently wearing a high-visibility firefighter's jacket and a plastic helmet that said "CHIEF" in big, glittery letters. He was holding a giant red fire extinguisher and a bag of marshmallows.
"Call 911, tum, because Ring 17 is about to become a literal sun!" Deadpool shouted, frantically spraying a nearby intern who was just trying to hand him a soda. "This is the 'Barbecue of the Century'! We have the man who eats fire for breakfast versus the man who is literally made of the stuff! It's the Salamander versus the Flame Emperor! Don't forget the sunscreen, because the UV index is about to go into the billions!"
Ring 17 was located inside the caldera of an active volcano. Platforms of obsidian floated on a lake of bubbling magma, and the heat haze was so thick it distorted reality.
Heimdall was broadcasting from inside a specialized refrigerator unit. "Match Number Nineteen! The Fire Dragon Slayer of Fairy Tail, Natsu Dragneel! Versus the Commander of the Whitebeard Pirates' Second Division, Portgas D. Ace!"
The Buffet Line
Ace stood on a piece of floating rock, his signature orange hat tilted down. He tapped his shoulder, and a small flame flickered to life on his finger. "I've fought a lot of guys, kid, but I've never seen anyone look at me like I'm a five-course meal. You sure you're in the right place?"
Natsu was drooling. Literally. He had his fists slammed together, sparks flying from his knuckles, and his stomach let out a roar that rivaled the volcano. "I don't know who you are, but you smell delicious! I was getting hungry, and you look like the biggest spicy wings I've ever seen! I'm fired up!"
The Ultimate Counter
Ace laughed and threw his arms out. "Higan!" He fired rapid-fire bullets of flame from his fingertips.
Natsu didn't dodge. He opened his mouth wide and inhaled the flames like he was drinking water from a garden hose. He let out a loud burp, a small plume of black smoke escaping his lips. "Thanks for the snack! Got any more?"
Ace's eyes widened. "You... you ate it? Fine, let's see you eat this! Enkai: Entei!"
Ace gathered an enormous amount of fire, forming a giant ball of flames that looked like a miniature sun. He hurled the Great Flame Commandment toward Natsu. The heat was so intense it began to melt the obsidian platforms.
The All-You-Can-Eat Winner
Up in the booth, Deadpool was roasting a marshmallow on a stick he poked through the window. "It's a classic case of bad luck for Ace, tum! It's like a steak trying to fight a guy who hasn't eaten in three weeks! Ace is a Logia—he is fire. And Natsu is a Dragon Slayer—he lives for fire!"
The giant sun-ball hit Natsu, but instead of an explosion, there was a massive slurping sound. Natsu was in the center of the sphere, his cheeks puffed out as he consumed the entire attack. His aura flared with a golden-red light, his scales began to appear on his skin, and his eyes turned slit-like.
"FIRE DRAGON'S... ROAR!"
Natsu unleashed a beam of superheated, magically-enhanced fire that was even hotter than Ace's natural flames. Because Ace is made of fire, the physical force of the magical roar sent him flying backward, crashing through the volcanic walls and out of the ring boundary.
"Match Nineteen winner... NATSU DRAGNEEL!" Heimdall shouted, his refrigerator unit finally running out of power.
Up in the booth, Deadpool threw his charred marshmallow into his mouth. "The Salamander eats his way to victory! That's 19 winners down, 32 matches to go in Round One, tum! Ace is gonna need a very long bath in an ice bucket after that one!"