inb4 Shadow of the Colossus.
You've got that right.
Shadow of the Colossus-Cenobia
You start by entering a small tunnel on your horse. It isn't long before your way is blocked. You have to continue on foot. You enter an ancient city overgrown with lush wildlife. You begin exploring this city, as your sword told you to come here. When you reach the temple, you see a statue of a large lion at the top of the staircase. Except it isn't a statue. This battle requires you to use the ruins of the city to your advantage.
Dark Souls-Ornstein and Smough
You have been brought to Anor Londo so you may claim the Lordvessel for Kingseeker Frampt. You have painstakingly made your way through this dungeon. You reach the fog door, so you realize a boss battle is coming. Okay, what could it be this time? You enter, and find a gigantic pudgy man wielding a warhammer. Okay, you think, this doesn't look too hard. Then, a knight enters from the balcony. He jumps down next to his overweight pal. They both charge you. This is the ultimate test to see if you are worthy to play Part 2 of this game.
Sonic Adventure 2-Biolizard
Both factions of Hero (Sonic, Tails, Knuckles) and Dark (Shadow, Eggman, Rouge) have teamed up from stopping the destruction of the world at the hands of Eggman's uncle, Gerald Robotnik. Sonic, Knuckles, and Shadow are attempting to shut off G. Robotnik's machine. However, it backfires and creates what G. called the prototype for the "Perfect Lifeform." It's a giant lizard with a contraption on its back, as part of its skin. It's truly a terrifying sight. So, what does Shadow do? He says, "Leave this one to me!" He approaches the Biolizard as Sonic and Knuckles go on ahead. You'd expect a Sonic level as he races through the space station, but you're instead playing as Shadow! The Biolizard truely put your platforming skills to the test in this ultimate battle of speed and quick thinking. (SPOILER: The true "Perfect Lifeform" is created later on as the final boss, and it's about a million times easier than the prototype, for some reason.)
Okay, I'll be honest, I HATED Ornstein and Smough and the Biolizard, but that's the reason I feel they were such good bosses. It's the best feeling when you finally beat them.
Cenobia was just plain fun, and my favorite part of all my SotC playthroughs.