I find it hilarious when people beg for a product for years or decades and then a fan makes it, the company goes crazy and sues everyone. This would not have been difficult for Nintendo to do and probably make them millions of dollars. Instead of making millions of dollars on a product people were begging them to make, they're going to spend that money on lawyers instead of development costs. The lawyers will probably cost MORE than development. And the person who released this doesn't have the money they're asking for, they wont get anything out of the guy when they out spend him in court.
I don't know why people think nintendo is such a nice company, they're known for being sue happy. They're known for putting their fans in debt when they make something that is a labor of love. Hell, porting "classic" games to switch would probably be enough for people and far fewer people would be able to pirate it.
I really want to know the justification from companies who don't make products that people ask for. They have the sourcecode, ports/remasters take relatively little effort at that point. The hardwork is already done