Note: The game is overclocked to remove the lag when traversing the castle.
Castlevania II's final boss is notorious for being incredibly easy to defeat with certain weapons. The Gold Knife and Sacred Flame cause Dracula to constantly take damage and the resulting hitlag prevents Dracula from moving. These factors combined make it possible to kill Dracula in about 10 seconds. That said, this boss is actually pretty difficult without those weapons. Dracula deals a ton of contact damage and the fangs he throws are difficult to avoid. The worst part is that avoiding contact damage is nearly impossible to do. The only way to avoid contact damage is by standing at the absolute edge of the left screen. If you're just one pixel to the right, you WILL take damage. Since you also cannot jump (you will get hit if you do so), it is sometimes impossible to avoid his fang attack, making a perfect run somewhat luck-based.
Luckily, the Flame Whip doesn't need many hits to kill him, so the luck factor doesn't matter that much. After killing Dracula, you get one of three (horribly translated) endings, depending on how long it took you to beat the game. If you get the best ending, then there's also a little easter egg at the end.
Joki currently has 154 views spread across 1 video for Castlevania II: Simon's Quest. His channel published less than an hour of Castlevania II: Simon's Quest content, making up less than 0.70% of the total overall content on Joki's YouTube channel.