XSp.

Megaman 3 must be in the Top 5 games most played in my life.

I remember almost crying when I got to the end… it was such an awesome sensation!
As a kid, I recorded the music from my favorite levels, specially the last levels of Dr. Willy’s castle (which I probably played hundreds of times), and the music from the end… and I’d listen to it over and over again savouring the memories of beating the entire game with no codes or cheats.
The game was truly hard (for me), but I really loved it.

Source: Again, memories and YouTube, and thanks to nesguide for posting an unedit gameplay video!