According to the German Wikipedia article > https://de.wikipedia.org/w/index.php?title=The_Great_Giana_Sisters&oldid=183387863#Angeblicher_Rechtsstreit_mit_Nin

According to the German Wikipedia article > https://de.wikipedia.org/w/index.php?title=The_Great_Giana_Sisters&oldid=183387863#Angeblicher_Rechtsstreit_mit_Nintendo https://de.wikipedia.org/w/index.php?title=The_Great_Giana_S... there was no lawsuit between Rainbow Arts and Nintendo, but only a threat of legal steps by Nintendo, which lead to the situation that the existing copies were withdrawn from being commercially available. Also the alleged lawsuit by Nintendo made The Great Giana Sisters world-famous, even though it was - as remarked - not sold anymore.