(yes, i stole this comment to make it better, original by jaidengameryyt2005): Devil Mario: "well well well... we meet again... Luigi. After all of this... after all the terror and misery has been brought into this world... you still dare to FACE ME...?" Luigi: "It's-a time to end THIS! YOU HAVE-A ALREADY CAUSED TOO MUCH DESTRUCTION ON THE LAND OF THE MUSHROOM KINGDOM... and since im their last hope... I WONT BE BACKING DOWN." Devil Mario: "ohhh... IM GONNA ENJOY TEARING YOU INTO SMALL LITTLE PIECES... THEN COME! COME FACE YOUR DOOM, MORTAL!" Lee epic fight begins
To put this to the settings -After years of building up hatred towards his brother, not thinking about it as it builds even more, never trying to talk to him about it, the ground has been layed out. This is is, this is Luigi's time to shine, and in the back of his mind, he realizes it's never been about being Player 1. Never been about getting the fame, it was never about being the one to be showered with love, but humility and putting your own life at risk to save others. With this new found resolution encased in his mind. He replaces his hatred into courage. Facing the thing he used to build hatred over. But seeing his brother in this state, he's going to stop him not out of hate, but out of love. By killing his possessed brother, he saves the world, and puts his poor brother's soul to rest. So he may no longer suffer. Luigi: Your Ambition won't come to pass!...I'm willing to risk everything to stop You!..." Devil Mario: *Then Face Me! ONE LAST, TIME!*
How this all happened: Basically mario got possessed by boos, and started to kill everyone in mushroom kingdom, then luigi saw it and tell the truth that he hates him and they fight so yeah.
Evil mario : well well well Luigi Luigi : IT'S TIME TO END THIS , YOU HAVE ALREADY CAUSED A LOT OF TEROR IN THE MUSHROOM KINGDOOM Evil mario : YOU ARE DEAD LUIGI
Me in the distance: your terror and today! Devil Mario : oh yes we have another friend to play with. This will be fun! Luigi : I'm not going to let you hurt him! Me : don't worry about me Luigi! Protect the power star!