early 90's animated film

I saw this movie in music class years ago, but can't remember the title. There's a lonely boy with a flute, and some girl appears and takes him off to some magical world, saying that he's supposed to save it from destruction. He meets some little black demon that can fly around like a buzzsaw, ala...

I thought I'd throw in a movie that's been budding me for well over a decade. I tried searching for it for no avail and I found an decent description from some other poor sould that can't remember the name either. Please help me from going insane by telling me the title. I remember an animated...

This One Is Partly Animated And Partly Not, All I Remember Is This Little Boy That Ends Up Going Down Into The Ocean Or Just A Lake Or Whatever And It Is This New Land And He Has So Much Fun, I Can't Remember I Think He Might Have Became A Fish But Maybe Not, But He Had This Magical Day In The...

I have been searching for this movie for some time now. I remember watching it when I was between 7-12 years old... I'm 24 now, no I'm not going through a mid-life crisis. -This movie or possibly a cartoon series was made sometime in the 80's or very early 90's. Story: From what I remember,...