I mentioned this to Mungo and Danzel, who mentioned it to Deceax, none of them knew what I was talking about.
In Folkypoke Village, if you stand in front of the door leading to Kompira mountain and hit a certain combination of buttons, some guy appears to the left of the door. I remember his name being "Cat Eyes" or something like it, and he will sell you decorations to Goemon's house.
I KNOW THIS SOUNDS LIKE I DREAMED IT. BELIEVE ME I KNOW HOW MUCH IT SOUNDS LIKE THAT.
Y'all have put more time into this game than I can comprehend. You know the game inside and out. Have any of you ever heard of this? I ask to satisfy my own curiosity, as well as, if I'm not hallucinating the entire thing, to possibly add more stuff to the 100% category.
Here's what I remember: I'm pretty sure you need Sasuke, and the button combos involve C-Up because I remember the "you can't use this skill" buzzing sound playing right before he appears. The decorations he sells include a daruma and 2 other things that I forget, they all cost over $1000, and they appear within Goemon's house.
Again, I know how wacky this sounds, but I remember doing this multiple times. If I knew more about romhacking I'd look for it myself. As I do not, I figured I'd ask the guys who know the most about this game.
Thanks for reading!
I'm now convinced this is real, and am reopening investigations. I'll let you know how it goes.
Not sure if it was a result of this being brought up in this thread, but the cutting room floor has a section about this. involves holding all the C buttons, A + B in certain areas https://tcrf.net/Mystical_Ninja_Starring_Goemon_(Nintendo_64)#Hidden_NPCs