That I remember finishing is probably Kirby's Adventure (NES). My gaming skills were never top-of-the-line so I never learned to play well the more challenging, reflex-heavy games kids I knew could beat in a single run without issue. But Kirby was right for me. I kept dying to that celestial body you fight after Dedede (I called it "the moon" - I don't think that's what it's supposed to be but not like I had much info to go off at my young age), since you'd get crushed by the screen below if you didn't finish its health bar off in time. Eventually I DID though and then the "true" final boss, what I just thought was a vampire with a tornado body, came to the fore. He was pretty easy. No time limits to beat him at least. So, there you go. Good game.