How did the properties and rights to NHL, NBA, MLB, NASL, etc. transfer to Japan?
It is an interesting question. Since the rights to the games were not transferable when Mattel sold the rights to the INTV Corporation, it is doubtful that they were transferable to Bandai. But, it is unknown whether there was any real infringement or legal action taken by any of the respective companies. All of the boxes in Japan did not carry any franchise rights, except for PBA bowling. But, there seemed to be some confusion because on the back of the box, and in the game catalogs, many of the games appear with licensing. Even the cartridges and the manuals have licensing.