Yoshi looked around for a vine to grab as he jumped into the air, avoiding the earthquake that the Ultra Brachio was causing. As the green Yoshisaurus landed back on the ground, he spotted a vine that headed upward, and he grabbed it, climbing up as he was then whacked into the wall by the Ultra Brachio's powerful tail. Shaking off the pain, however, Yoshi continued climbing up the vine, reaching the top and grabbed some of his green-spotted eggs. As he swung the vine back and forth, he waited for the Ultra Brachio to approach, who let out a powerful screech that shook the room. Hanging on tightly, Yoshi jumped from the vine onto the Ultra Brachio's head, damaging him with several flutter kicks.

As the Ultra Brachio tried shaking Yoshi off, Yoshi slid down the gigantic sauropod's neck and stood on his back, aiming the eggs at the back of his head. One hit after one hit, the Ultra Brachio screeched in pain as he caused more tremors in the room, causing several pebbles to fall from the ceiling. One of them hit Yoshi square in the head, but he managed to shake it off, and performed a ground pound right on the Ultra Brachio's sweet spot, causing the gigantic sauropod to fall flat to the ground. Yoshi then slid down the neck, and turned around, to face the Ultra Brachio, eye to eye. Smirking, Yoshi finished off with a powerful tail whip to the face, wounding the Ultra Brachio severely. After one large groan, the Ultra Brachio collapsed, breathing slowly as a giant golden key popped up from the ground.

Picking up the key, Yoshi headed towards the southern direction, leaving behind the defeated Brachiosaurus boss as he headed out of the room, and back into the lush, troical jungle. Upon entering the jungle foilage, Yoshi proceeded to head down the muddy hill, escaping the lush Sauropod Forest as he walked towards a ledge, which led out to the open ocean. Looking down to see the salty waves splash onto the rocky exterior, Yoshi felt the windy breeze come across his body as he sun shined brightly down on him, the white clouds parting off as several Pteradactyls were seen flying around the salty sea, collecting fish. Going by instinct, Yoshi turned to his left, and headed up the wooden bridge, which led to several cliffs jetting out from the mainland towards the western direction.