There was a game on my friend's SNES or NES when I was a kid I thought was the Legend of Zelda for the longest time, and even bought Zelda because I though that was it. (Not that I was disappointed)
It was a side-scrolling adventure, where you played as a character that I recall looking like Link (but it might be that because I associated it with Zelda, my memories have changed), and perhaps another character, maybe playable, who I recall being a girl.
Anyways, it was a game with platforming and fighting enemies. I remember clearly a power-up that made boulders circle you, protecting you for a while.