Does... Castlevania have a fourth wall?
Who knows? But, if it does, it'll probably go like:
1986
Jonathan: Right this is Julius' 6th birthday. Come on Alucard. Let's buy him some new Nintendo games.
Alucard: Sure. Hey, this Legend of Zelda looks cool.
Jonathan: How about Castlevania? I heard it in TV. Konami's newest hit.
Alucard: Let me see. Wait, Dracula? Belmont? Whip? No. Jonathan. Just no. We keep the secret.
Jonathan: Come on he's only 6 years old. Besides, everyone knows video games are fiction.
1997
Julius: Alucard! Look! This new game features you!
Alucard: Oh my god...
Julius: Was your girlfriend Maria? Your mom was Lisa?
Alucard: Stop it! Yes. Yes. Now STFU you're making me sick.
1999
Jonathan: Alright. You, are a heir of Belmont clan...
Julius: I know. It's Castlevania stuff, right?
Jonathan: Y... Yes...
Julius: So I have to beat Dracula?
Jonathan: Exactly.
Julius: The give me the damn whip!
Jonathan: Oh yes! The whip!
2036
Soma: Hi Julius, how you've been?
Julius: Soma. Play this game. This will tell you the future.
Soma: Castlevania? Nintendo DS? That's ancient.
Julius: This series' games tells about everything. This is a shitty game, but you have to be careful about anything that happens in this thing.
later...
Celia: Soma die!
Soma: Yeh I kinda know this from the beginning, now my power of dominance will come back and you will invite me to your castle where guys called Dario and Dmitrii will be trying to kill me, so I'll just use the Clamih Solais! (beats Celia and monsters)
Julius: Told you.
Soma: But anything after this event doesn't happen now, right?
Julius: Meh. Don't bother about it. It was intended fiction anyway.