A cool, text-based glitch has been discovered in the now 16-year-old Paper Mario 64. Stryder7x (who dedicates a bulk of his channel to Paper Mario) found an odd glitch when falling "out of bounds" on the English version in which he got stuck talking to a character. When he tried the same thing on the Japanese version he got custom text from the character telling him "he shouldn't be here yet" and to "contact Nintendo support".  

Pretty amazing that the development team had the foresight for this!