Super Mario Bros: The Lost Brother

Super Mario Bros: The Lost Brother is a fanfiction created by CaptainKodachrome. It is the story of an original character named Dragon Toadstool, who is Princess Peach's older brother. The story remains within the realm of The Mushroom Kingdom, though characters from other video game franchises, such as Sonic the Hedgehog and Crash Bandicoot appear as supporting cast.

History
CaptainKodachrome claims the idea of Dragon came to him while searching for Super Mario action figures. The character was created to fill the gap in absence of any of Peach's family in the Mario games. Writing began in second quarter of 2014, and the first part was posted to Fanfiction.com in December 2014. Part two was posted in June 2015, with the final part being posted a few months after. It has a small following, and a sequel is being created by CaptainKodachrome, as well as a cancelled movie project. In mid-2019 CaptainKodachrome confirmed he would be rewriting the entire series.

Differences from the canon Mario universe
In The Lost Brother, Bowser is more cunning and dangerous, setting traps, hiring bounty hunters and even breaking convicts out of prison to get his deeds done. As a result, most of the Mario characters have a more serious wind about them, especially Mario himself, who shows little to no resemblance to canon renditions personality-wise. Characters from other video games appear, and all the charcters seem to know each other, even ones who have never met canonically (Mario and Crash Bandicoot being the perfect example). There are also more original characters, such as Trowser, Bowser's father; Kyle the Dark Koopa and Wizenhimer the Magikoopa (Albiet derived from a character from the Super Mario World cartoon series).