The answer to WHO Rosalina's brother is.

To start this story off, MatPat is a now retired YouTuber. In MatPat's two parter videos on Rosalina unmasked the second video ends with briefly talking about Rosalina's Brother… But who is her brother? Who else do we know that wears a green cap? Who else has fused earlobes, Blue eyes, blond hair, has a sister, and a Mother who dies by a tree? Someone who is attracted to a blonde haired blue eyed princess in a pink dress, is primarily shown left-handed and around as tall as Rosalina? Who other than the hero of time himself Link! Before we go too far into the story I should probably explain Link's long pointy ears. That part was somewhat tricky until I remembered something. How was Rosalina's world destroyed? It was sucked into a wormhole… A WORMHOLE! That definitely explains the pointy ears Link has. Simply based on a process that has been found to stretches people out, a prosses that is known as Spaghettification. Now for the story you've been waiting for. Chapter One: A New Beginning Once long ago in a kingdom that no longer exists Princess Peach chose a different person which changed their universe for the better! Peach began to cry but these weren't sad tears, she was happy for once. She was about to marry an amazing man and the best part was that he hadn't captured and forced her to, nor had he saved her from a cage and expected her to marry him. Luigi had shown her kindness and love, and he didn't expect anything in return. That's how she knew he was the one she wanted to spend the rest of her life with. As Toadstool let go of her arm and headed for his chair Princess Peach stood next to the man of her dreams. Luigi looked at her and with a smile he said “You look beautiful.”. Luigi sure knew how to make her feel special. In previous times she would have caught herself looking behind her at the crowd wishing she could just disappear but today was different, in Peach's mind there was nothing to look back at, but there was so much to look forward to. She remembered the moment she had completely fallen in love with Luigi. He had saved her from a painting in a scary ghost mansion, but he seemed genuinely concerned about her well-being. Now they were standing together, it was like the whole world disappeared. They faintly heard the words “Do you take them to be your lawfully wedded…” and they both said “I Do!” as they held hands. The entire kingdom erupted in cheers with everyone overjoyed. It was a sight to see Peach and Luigi slow dancing the night away. The love they shared was not something that faded away with time and soon after they were proud to announce that they were expecting a baby girl. When she was born the kingdom fell in love with the new princess who was named Rosalina. A while later another announcement was made but this time they were expecting a boy. He was named Luigi Jr. and his older sister grew attached to him right away. They were the perfect little family, however, there wasn't peace everywhere in the kingdom. Mario was devastated when he found out about Peach and Luigi. He left and didn't even attend the wedding, instead he wandered the desert in hopes to save the princess there who was named Daisy. Mario had succeeded with saving her but a relationship was never really formed. Daisy was great full but Mario wasn't really her type. They chose to go their separate ways and keep their relationship platonic. All trace of Mario had disappeared since then of course that didn't stop Luigi from looking for Mario. "Mario is missing, but he's bound to be somewhere." Luigi would think to himself when the kids were successfully put to bed. Peach would often come downstairs and snuggle Luigi while trying to help him find his lost brother. Peach even hired a special detective/adventurer known as Captain Toad. One night when the kingdom was still a shadowed figure arrived at the castle. Peach and Luigi heard a loud knock on the door. They answered the door only to see Mario standing in front of them. It had been around seven years since they had last seen him. Luigi said “Oh hey bro. What brings you out here? I've been searching everywhere for you. I have so much to tell you big bro!” Though to their surprise Mario just stood there letting the rain fall on him. He seemed off like he was hiding a darkness inside of himself that had eaten away at him until nothing remained of the brother Luigi loved and would have done anything for.