I did think so, I just was curious of how this was ruled... if that makes sense

this is that run btw:

In P-2, you can beat FP and Sisyphus without entering the arena, turn around and kill all other enemies, granting a P-rank. I did this to get a 1:59.743 P% timing. I feel as if this is disallowed, so I wanted to make this public for official ruling.