I have infinite rainbow shells (I broke SMW), and as such, I am invincible, can fly, and breathe fire. I am superior to any Yoshi you could meet.
Squidboards
PrinceOfKoopas
...Hm, maybe you are the best.
But you're not my favourite.
But you're not my favourite.
Lyn
R00d. I'm sure your favorite Yoshi is Bowser Jr., then.
TeddyBearYoshi not confirmed best Yoshi, though. I've known many Yoshis throughout my years.
Killed a great many, too. Yummy.