Just made all retroachievemens in this game in hardcode mode (without save states). Probably the easiest NES game with the easiest achievement set.
If you have never played, I recommend giving it a try. The gameplay is great, nice soundtrack.
What is the easiest game for NES in your opinion?
Back in the day I borrowed this game from my cousin and got really good at it- I once beat it in a little over 18 minutes.