Ha! Very true. I have a bad habit of skipping over games I know I'll probably like. I get so overwhelmed!
I had no idea he was in Nocturne. I want to collect all the SMT games but I can never find any of them.
You get him near the end of the game. He's involved in some of the story parts which is cool. You have to complete the extra dungeon which you can only advance through once you beat these optional bosses throughout the game. And like all optional bosses these guess aren't easy. Probably some of the hardest RPG fights I've done.
I always heard to stay away from DMC2. I played it once but don't remember much about it. I really liked the first one, I beat it a couple times. Not sure how well it holds up.