Re: "All the Yoshis of the Rainbow" or "Where is the Darn Purple One?" -
09-17-08
I think you must be thinking of Super Mario World 3 where the purple Yoshi was in the special stages and it gave you temporary wings with anything you ate. That's the only purple yoshi I recall in any mario or yoshi game.
The black and white yoshi were pretty cool though. They were super powerful when they had all their health! And even more powerful when you got that thing that made em really happy. I can't remember what it was but maybe you know.