YMMV / Ys II: Ancient Ys Vanished – The Final Chapter

• Anti-Climax Boss: The final boss, because Adol is given everything he needs to win the fight beforehand, including the best equipment and a Last Disc Magic that makes him invulnerable at the cost of gradually draining his MP (nothing that a Roda Fruit or an Elixir can't solve).
• Complete Monster: See here.
• Even Better Sequel: Ys I was little more than a prologue setting up the atmosphere and mythos of the world very loosely, with a threadbare and unresolved plot, three dungeons and a breakneck pace with plausibly half the game being in Darm Tower alone. Ys II took all of that, and made an even bigger adventure that is resolves the numerous lingering plot threads, expands on mechanics, and goes above and beyond anything the first game tried to do. There's a reason why most later releases bundle them as one package and even have II start immediately after finishing I.
• Suspiciously Similar Song: The B-section of "Noble District of Toal" from Ys II is similar to that of "Firecracker".