The Japanese version of Super Mario RPG is absolutely chock-full of messages that make reference to all aspects of pop culture. There are references to anime, music, movies, and more. For example, the line above is a reference to Lupin the III's Goemon.
Obviously, most of these references were yanked from the localized version of the game, as audiences around the world just wouldn't understand them. The decision makes perfect sense, but all these years later, we can finally get a look at what was changed and the references tied to those lines!