This is pretty much the highlight of the original series!
This is also said to be the best in the series, and I agree: it's fantastic! It's quite an improvement from the original, adding more bosses, cooler weapons, better graphics, a great soundtrack, the password feature, and more. There are 8 robot masters, each one having a unique ability, stage, and some have enemies only found in their level. Metalman, Flashman, Woodman, Heatman, Bubbleman, Crashman, Qiuckman, and Airman, each one giving you a new power that has an stronger effect on another boss. The best to use in a level, and said to be the best power-up ever, is Metalman's Metal Blade.
Overall, the game is great, with the music, weapons, enemies, unique stages, graphics, and everything else, this is definitely a game to get. No matter if you're a good player or bad, new or old, it's a game to get and play!
9.5!