Driver's License Lunacy

Find Cosmic Bananas for Bubbles: You'll start this substory with Bubbles feeling hungry on King Kai's Planet. King Kai mentions cosmic bananas, and Goku teleports to Bulma to find out more. Bulma knows they're deep in the jungle and marks their location on your map. Open your world map and head to Blake Bog in the Central Plains Area. Look for the swampy area with lots of trees; the blue marker should guide you right into the zone. Once the map changes from a blue marker to a general circle, you can start searching for the bananas. You need 10 Cosmic Bananas, and they appear as familiar purple orbs. Use your Ki-searching ability to make them easier to spot. They aren't hidden, and there are plenty to find.

Return to King Kai: Once you've collected all 10 Cosmic Bananas, you'll automatically return to King Kai's Planet. Speak with King Kai to complete this part of the substory. As a reward, Bubbles will give you a piece of Refined Gold, along with EXP, D Medals, a Shenron Plush, and Bubbles’ Soul Emblem.

Help Dr. Briefs: Now, head over to Capsule Corporation and find Dr. Briefs in the middle area. He needs your help gathering parts for a new machine: a Skull Robo Gear, a Densite, and some Silver Ore. You might already have the Silver Ore if you've been mining mineral nodes. Dr. Briefs mentions you'll need to break large boulders to find Densite.

Gather Skull Robo Gear: Exit Capsule Corp, and you'll see two blue markers on your map – one west and one northwest. Let's go to the western marker first. It's located at the entrance of a small cave near the water. As you approach, some Skull Robo enemies will appear. Defeat them all, and you'll automatically receive the Skull Robo Gear. If you still need Silver Ore, the same cave has mineral nodes that should drop it.

Find Densite: Head to the other marker on your map (the northwest one). Remember what Dr. Briefs said about breaking large boulders? You need to find the biggest rock formation you can destroy using Ki blasts or by flying into it. This should be right where the marker is on your mini-map. Destroy it, and search the rubble for a purple orb that contains the Densite.

Return to Dr. Briefs: Once you have the Skull Robo Gear, Densite, and Silver Ore, return to Dr. Briefs at Capsule Corporation to complete the substory. You'll earn EXP, D Medals, an Ultra Brain Bread, Card 045, and Dr. Briefs’ Soul Emblem.