The on-and-off debate over whether Yoshi has a saddle or a shell has been settled once more with a simple answer: technically, both. The saddle was meant to be a shell in its original design, but the red half-bulb on Yoshi's back is specifically meant for a rider.
Why is Yoshis nose so big?
Yoshi's large nose unsurprisingly allows for the detection of hidden collectibles as well as flowers by smell and, as demonstrated in the Super Smash Bros. series, may be used as an offensive weapon.
What type of animal is Yoshi?
Described as either a dinosaur or dragon, Yoshis are four-limbed bipedal animals with a tail which have a shell-like saddle and a chameleon-like tongue. They have four digits on each hand and feet which resemble boots (which they are born with).