Chained by Fashion: Cornell, the initial protagonist of Legacy of Darkness, was supposed to be in the game in a ball-and-chain prisoner outfit.
Childhood Marriage Promise: Under a pretension of Puppy Love, Malus pesters Carrie to marry him in her bad ending. After she accepts, he ominously says, "Now we have a binding contract..."
Creepy Child: Malus, who, after being seemingly escorted out of the castle, is suddenly back with worrisome dialogue. He's actually Dracula himself, reincarnated in a younger body.
Deal with the Devil: Buy too much stuff from Renon and you'll have to fight him later when he comes to collect his "payment".
Dem Bones: Very first enemy to be fought, they are later shown to be led by King Skeleton who can call them to his side at a whim.
Difficulty Spike: The nitro/mandragora escort business; before it, you are happily whipping or magig missiling enemies on your path, but now you have carefully move a dangerous item along a hazardous path.
Disc One Final Boss: Used on two different occasions during the game. The first example is the Behemoth encountered in the Castle Center, which uses the same battle theme as the final boss. The second is Dracula's Servant atop the final stage, which has a unique battle theme to himself.
Early Bird Boss: Skeleton King, thanks to appearing before the player gets the hang of the controls.
Easy-Mode Mockery: If played on Easy, the game ends after the Behemoth boss battle in the Castle Center.
Fast-Forward Mechanic: The Sun and Moon cards can be used to advance the current time so you can (among other things) have certain timed encounters and battle vampires during the day when they're weaker.
Flunky Boss: King Skeleton summons common skeleton enemies to its aid by bashing the ground with its bone-club.
The game doesn't really tell you that the ending is in fact impacted by how much time you took to get there.
Most of the secrets require the player to locate insanely-placed invisible platforms that are usually exactly halfway between the nearest savepoints and / or right before the end of the level. There is never any indication of the platform's position, and one even has a gap deliberately placed right before the nearest visible platform to kill you on the way back.
Happily Adopted: Carrie mentions that she was raised by a loving and caring step-mother who ultimately sacrificed herself to save her, to contrast the villainous Actrise who just casually claimed she slew her own biological child as the first of 100 child sacrifices to resurrect Dracula.
Hedge Maze: The villa stage has a nasty hedge maze you have to run through while being chased by its gardener and his two stone dogs. Of course you only have to explore about an eighth of the maze and, if you know where to go, will likely get through before the chain-saw monster and his pals even shows up.
Intimidating Revenue Service: Renon starts out as a demon shopkeeper; you can use his contract to summon him if you should happen to find it lying around for a Dungeon Shop, and purchase any supplies you need. Just before the final boss, he shows up to let you know you won't see him ever again, but how the story plays out depends on your spending habits; if you were thrifty, he tells you a war is brewing elsewhere, which will give better profit margins than selling chicken drumsticks to a single adventurer. If you spent more than 30000 gold, he reveals that there was some fine print in the contract that Carrie (could not read because it was written in a demonic language); specifically, there's a tax on his services that he has to collect now, and that tax is your soul! Cue fighting for your very life.
Lizardmen armed with tridents, dual weapons and swords and shields are an encounters in the Undergorund Waterway and inside the Dracula's castle.
Player character also comes across one Heinrich Meyer, a merchant who was turned into a lizardman when he came to the castle looking for a good deal. He helps the player by giving information regarding the upcoming nitro and mandragora business, and handing out a key.
Stock Subtitle: Used for the original Japanese title, Demon Castle Dracula: Apocalypse.
Storybook Opening: The game starts with the book already open on the a page holding the file select menu. Starting a new game results in your signature appearing on the document, and the pages flipping backwards to reveal it's a copy of the Necronomicon.
Super Drowning Skills: Handwaved by the protagonists by having them remark that the water has been 'poisoned' by the evil of the castle. The steam that rises whenever you fall in seems to suggest a more malicious chemical at work, though.
Villain Ball: In the good endings, the player doesn't catch on the ruse that Dracula that they just defeated was just an impostor until Malus reveals himself to be the real Dracula, for no other reason than to give the player a True Final Boss.
War for Fun and Profit: In the final, non-confrontational (if you played your cards right) encounter with Renon, he states he is needed elsewhere, since an impending global war is about to break out, and it is going to open wonderful business opportunities.
What Happened to the Mouse?: In the path to good ending, Vincent appears to dose Dracula, who has again assumed the shape of young Malus to trick the player character, with holy water. After the ensuing True Final Boss fight, he disappears from the game.
Wicked Witch: Actrise, who is willing to slaughter children in order to gain her goals.