Word on the street is that Yoshi cannot move from one level to another. I understand why some Yoshi fans would be upset at this, but it sounds like a good move to me. In Super Mario World, it's too easy to just get a blue Yoshi, grab a shell, and fly over all the obstacles. When playing on the Virtual Console, I actually tried to force myself to play without Yoshi at times and found the game more challenging/interesting. It's like the Donkey Kong Country games--the helpers are there for you to use their abilities to reach some secrets, but you can only use them within the confines of a level to prevent you from abusing their powers. Well, that's how I feel about it, at least.