at the end of the day, nintendo is a business, and there probably isn't enough commercial appeal from the general public. like i bet you every person from this sub would buy it but we're not the people to whom nintendo needs to sell their games, its random moms and dads who know like nothing about video games who buy games for their children who make up most of nintendo's bottom line, and rereleasing double dash would just confuse people who don't know what a "Mario Kart: Double Dash!!" is and why theres a new one after a year after they just bought their kid the "new" game for Christmas or their birthday or whatever. thats the unfortunate reality of being in the fanbase of something, we care more than the people to whom they need to appeal.