Probably fake although Pokemon Red/Blue glitched out like that. Including the music fucking up in BIZARRE ways.
also Metroid's secret worlds :(((
(repeat story about how walljumping gave me an existential crisis when I was seven)
Oh, I really want to pick up Majora's Mask sometime, and maybe an N64. Although I'm always paranoid about the save batteries on old carts dying and then I'd have to emulate it anyway but at least I wouldn't have any moral concerns, I guess, but then you get into the whole issue with N64 games not really being playable with anything but controllers, so it's like, well damn, I could get the GC issue, but apparently the built-in GC emulator makes Majora's Mask glitch and crash sometimes, so like, I'm basically screwed either way.
In any case I thought OoT and TP were both creepy as hell. Actually, LttP is like the only Zelda I DIDN'T find even remotely unnerving and maybe that's why I don't like it very much.
Okay, I just remembered that the Wind Waker series exists. WW was creepy even if I didn't like it nearly as much as OoT or TP. Can't vouch for the DS games or Minish Cap. I DID find the GBC games... not necessarily creepy but kind of... strange and melancholic.
Zelda 1 and 2? Creepiest games in the series. Zelda 1 just takes place in this hugenormous wasteland where everyone is living in caves. Zelda 2... Here let me get a picture.http://img833.imageshack.us/img833/497/zeldahell.png
Seriously. Someone from Scott Sharkey's webforum pointed that out awhile ago.