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Development of this started after the development of Mario64. (everyone knows how much time Nintendo takes and the N64 was designed for Mario64)

The prototype name was Springman which is somewhat a parody of Jumpman, Marios "original" name.  (spring is not only a tool to help people jump higher it also means jump  in general)

And it was NOT MADE by Sony. So I fail to see how SONY did anything at all.