"Mario! Glad to see you finally made it to Yo'ster Isle, home of the Mushroom Derby. Say...now that you're here, we could use your help. Please talk to a few of my pals here and...What/ You can't understand them? Well...hop aboard and I'll be your interpreter!"

(After beating Boshi)
YOSHI: "Thanks to Mario I finally beat that rascal, and we can all race together now. Here's something to remember me by. Next time you're in trouble during battle, use this to give me a call."
OTHER YOSHIS: "Starting today, Yoshi's the new BOSS around HERE!"
YOSHI: "But we don't need a BOSS! Anyway, I just want to race! Come on, Boshi! Let's see what you're made of!"