Well, I've heard reports that people have odd glitched up Hall of Fames that make weird noises and spliced images, but to be quite honest, my game crashes whenever I view the HoF. Everything's normal when I cut it back on, though.
I haven't experimented with anything extreme in my game. Just MissingNo, 'M, and Glitch City quite a few times. I wonder why this is so. I could post some screenshots if you'd like.