Super Metroid Ridley 1 Hitless (Retroachievements Super Metroid Bonus: It's a Livin') 

This looks easy, but it requires a good bit of luck. I kept trying for like a half hour beforehand and (combined with me being bad) Ridley just kept giving me patterns that seemed practically impossible to dodge? (At least, with any consistency).
Also, I used the Fastforward and turbo button features in RASnes9x since RetroAchievements allows it. The fastforward mainly just to decrease the time between attempts, and turbo because I did not want to keep mashing the Y button for however long this would take me. I think me getting this singlehandedly made it go down from like 30k retropoints to ~17k? Unless I just misremembered how valuable it was.