Ok, theres a Glitch I found in SMS that I am sure will work for you all, it works for me everytime.
all you have to do is get yoshi and start making him throwup, but dont hold the button down all the way, dont let it "Click". do this untill yoshi stops spraying just or start it and press a and yoshi will start having these seizers. XD XD ! hold the button there and you can run all over the island with a yoshi that needs riddlin. HAHA!
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Everything above was sarcasm. Please ignore everything I have just said.