in the trading quest?
yes
This is how, its a very long quest however so pay attention
Get the Pocket Egg from the Cucco Girl. Wait until it hatches then wake up Talon with the chicken and give it back to the Cucco Girl. You will then get Cojiro. Bring it to her sleeping brother in the Lost Woods (He will be next to the stump where the Dancing Boy was), rush the Odd Mushroom to the potion shop in Kakariko (on horseback) before the mushroom spoils, and give it to the old woman in the back room of the shop (door is on the left of the counter). Bring the odd potion to the girl standing in the Lost Wood. Take the Poacher's Saw to the carpenter near Gerudo Valley. Take Biggoron's broken sword to The Big Goron on top of Death Mountain. Bring the prescription to King Zora. Take the Eyeball Frog to the scientist/chemist by Lake Hylia. Bring the Eye Drops to The Big Goron. Get the claim check then get then later get the sword.