The battle had already been going for 13 days with no end in sight. Significant losses on both sides. It was brothers against brothers, fathers against sons, advisers vs subjects. The kingdom was in disorder. Mario and his brother Wario, and his side had already lost their sons.
On the other side Luigi and Waluigi lost their greatest strength, their advisor Toad. Waluigi gave Luigi full control of this army.
The next day, Luigi made arrangements for the biggest battle that will ever occur. Everyone knew it would come down to this but with all the bloodshed and loss on both sides, no one but Luigi was looking forward to it.
At high noon, Luigi starred down Mario. Mario did not flinch and looked across the battlefield at his brother Luigi. Luigi stepped forward. All of the side battles ceased and all eyes were on the two brothers. Mario wanted peace and Luigi wanted to prove he was the best warrior. "Brother, let us end this now. We do not have to fight. Look around you, this needs to end", Mario said before he was cut off. "Oh, this will end. It will end once I destroy you!" Luigi said with a smirk on his face. Mario shed a tear and with a heavy heart said, "so be it."
(Mario vs Luigi. Source: GenoStar)
Luigi began throwing his his green fireballs toward Mario who quickly jumped to the side and threw his red fireballs. When Mario was catching his breath, Luigi threw a fireball and it hit Mario's hand. He was wounded. Luigi decided to capitalize on an injured Mario. He kept throwing fireballs towards Mario who had to jump around to dodge them. Mario jumped up on a rock and slammed his body down into the Earth sending a wave of rocks and dirt toward Luigi. Luigi could not see but continued to throw fireballs all around him. The onlookers had to run because now they were getting attacked and burned from Luigi's fireballs.
Mario figured this was his time with the now blind Luigi throwing fireballs in every direction. When a fireball came towards him he took out his secret weapon. It was a cape. He put it on and used the cape to deflect the fireball away. The cape did not even burn. When another fireball came towards him, he deflected it right back to Luigi. It was a direct hit. Luigi fell to the crown and wailing in pain. Mario determined to end his pain and finish this battle for sake of eventually peace conjured up a fireball as big as Bowser and shot it towards Luigi. When the smoke dissipated, there was just a shadow of Luigi's body in the earth but the body was gone.
Authors Note: I used Arjuna and Karna as my template for this story. Arjuna is Mario and Karna is Luigi. These two bothers had to fight each other in one of the deadliest battles of the who war. Instead of using bows to attack each other I used the ability of throwing fireballs. It only seemed fit that I carried on the use of Mario in my stories. We always see Mario and Luigi working together so I figured why not see what happens when they are against each other and I thought this would be the perfect story for it.
Bibliography:
Source. Indian Myth and Legend by Donald A. Mackenzie (1913). Arjuna and Karna.