Which one? There isn't a standard one, I don't think, akin to the Genesis's TMSS screen or PS1/Saturn/every-console-since-then's boot screen.
If "crawling pixels" is what I think it is, yeah. It's really noticeable during Yoshi's Island for some reason, where there's some flickering around the edges of sprites as they near the edges of other sprites or level geometry, usually pixel-tall, where things look like they're drawing a pixel or two too far to the side. It's a very bizarre effect, one I don't think I've seen at all outside of the N64.
Aliasing, though? Not really, there's generally a solid amount of anti-aliasing everywhere in the games I've tried. It's a low amount, admittedly, but it's very noticeable at the low resolution the N64 runs at.