If you mean by other things fangames and romhacks then yes, those never claim to be original material so unless authors make money with it, nobody should bother them like Nintendo does. It's a matter of being honest and transparent with what you...
Imagine living in a society ruled by copyright laws, and letting someone else insert more-or-less edited versions of others' works into your own, no notice or anything.
Which you can find here:
https://github.com/BioRhythmicStudios/warioland4
Personally, I've had no issues with it so far. The Entry Passage works fine (both the first level and Spoiled Rotten), as does the entire Sapphire Passage (including...