I seem to remember two glitches from the PS1 version years ago.

Time trials instantly ending with 0.0.0 and normal levels jumping straight to the boss.

I see the guide with Time Trial Skips, but I'm not finding any information on the main level skip. I wanted to confirm if this is a known skip / how to reproduce it. It could just be a wrong memory, but I was pleased to see the time trial skip was confirmed and verified in RE.

Any insight is welcome. If I can reproduce it I'll post an update

As far as I know, I haven't seen any way to jump straight to a boss in normal levels, so any information you might have on that matter is certainly more than welcome! :)