Was left out due to wanting to get a guide up before finish all of Alex Kidd. Now that I have the 200, the guide is 100% complete.
I didn't find the autograph letter for the king. When I ran into him in Level 12 he basically told me "I dont want to talk to you", then I ate the riceball, and finished the level. I still managed to get all the achievements for Alex Kidd, so it's not necessary to finish the game.