PS88 is probably on TV-Tropes somewhere, as that “optional secret boss who’s actually stronger than the final boss”.

I really regret not going head to head with him without using Psychoanalyze, that would have been an awesome challenge given how easy the final boss was to beat, without consumables, with just a simple re-spec. After getting my nuts kicked by the final boss for so long, I felt disappointed I didn’t get the bitterly close life-death struggle characteristic of pwning as a Re-Re. Log in to see images!