Super Mario World

Easily Get Yoshi:
Go to Yoshi's Island 2, pass the koopas and the first 3 boxes, then hit the next 2 and in 1 of them is Yoshi.

Get Fly Power Easily:
Go to Donut Land 1 and jump on the first flying guy, then press start and go back; then do the same thing to have an extra feather.