ugh yeah. they're all annoying like that. aria of sorrow had the whole "you must have three specific souls equipped during a boss" thing, which is already annoying because there are other souls you'd much rather use and the only hint is three easy to miss book items that give vague hints to do it. harmony of dissonance made it so you had to equip maxim and juste's bracelets during the "final" boss fight (and it only worked in one castle) which, considering you started with one of these bracelets and both did nothing
, odds are you've long forgotten about them.
it drives me mental because now when i pick up a castlevania game the first thing i have to do is look up a walkthrough to see how not to screw myself out of finishing the game, which then spoils the shit out if the game for me, but they're otherwise really damned fun.
let's face it… castlevania games are fun but they suck when it comes to extra content.