"Your inventory has been lost. Oh, come on, you saw it coming!"

Yeah, repeating the formula doesn't excuse lack of subverting expectations or lack of innovation. Sadly it seems they didn't only copy the look and movement from Megaman. The villains are more generic this time compared to version 2 of the first game, released after this second title

Such a criminally underrated hidden gem, too bad that very few ppl even know this game exists.

Hope we ever get a third entry eventually...

Better than the first and as I've said in my review of BK1 you will often exit and reenter rooms to analyze cycles and plan out a route. That is what makes the BK Series so unique compared to other rage games where you turn off your brain and just brute force your way through.

My only problem with this game is the clone boss. It's such a pain to beat

Probably one of the best games on the NES
It's disgustingly good, and even better than the first