Bosses, especially in NES games, fall into one of two categories. They’re either insanely easy once you determine the trick to beating them, or they’re insanely hard, requiring perseverance and multiple hits. Wart is neither of those. While there are strategies to defeating him and avoiding getting hit, there’s no automatic road to victory. On the other hand, it is very possible to get very good at defeating him, taking no to minimal damage. In a way, he’s like Mike Tyson.
Wart’s castle is tough enough to get through, and then beating him is another stressful task. Ultimately, it’s one of the most rewarding moments for the entire console. And that doesn’t even include one of the most elaborate, fun endings you’ll see in the 8-bit era.