Dragon Balls can be obtained from Time Patrollers throughout various Parallel Quests. Dragon Balls can grant you one of many wishes and can be reobtained at any time to choose a wish. Time Patrollers appear after you clear a room of the enemies. Upon talking to them, you must fight them and deliver the killing blow. They will drop 2 items. The second item has a chance to be a "Key Item" which is always a Dragon Ball.

This list is a work in progress. Please leave a comment if you know of other PQs with Time Patrollers.

The following parallel quests are known to have Time Patrollers:

• 02 - Prepare for the Attack of Saiyans!
  
• 05 - Attack of the Saiyans [Warmanreaper]
  
• 07 - Burst Open and Mix!
  
• 12 - First Battle! Ginyu Force
  
• 15 - The Explosion of Namek [Lindat]
  
• 18 - Return of Ginyu Force! [epsilon Rose]
  
• 19 - Let's Train [Lorthrean]
  
• 22 - Earth in Danger! [BossLoaf]
  
• 26 - Warrior's Annihilation - Future Chapters [freezframe]
  
• 32 - Super Saiyan Bargain Sale [Takku]
  
• 37 - Potara Warrior [Seru]
  
• 42 - Power of a Super Saiyan God [Dante781]
  
• 52 - Great Ape Festival [Fan]

* names in [ ] are contributers.

Dragon Balls are used to make a wish, granting you one of the following:

• I want money! - 500,000 zeni
  
• I want a rare item! - Power Pole accessory
  
• I want to dress up! - Journey to the West style set
  
• I want to get stronger! - 5x Soul of Resonance, 3x Synthetic Device to craft Z-Souls
  
• I want to grow! - Level Up once
  
• I want a new Ultimate Attack! - Ultimate Skill
  
  • 1st time - Blitz Hell/Shocking Death Ball
    
  • 2nd time - Minus Energy Ball
• I want a new Super Attack! - Special Skill
  
  • 1st time - Flash Bomber, Drain Field, Lightning Ruin, and Air Consumption
    
  • 2nd time - Castrol Lightning Dragon Bullets, God Speed Light Bullets, Whirlwind Spin, and Sleepy Boy Box
• I want more usable characters! - Special Character Unlock
  
  • 1st time - Gogeta SS4
    
  • 2nd time - Android 17
    
  • 3rd time - Omega Shenron
• I want a second chance at life! - Stat reset
  
• I want to be drop-dead gorgeous! - Character appearance reset

When farming in parallel quests, the Time Patroller most commonly spawns in the first map after the room is cleared of enemies. Using "retry" from the menu will reset the PQ. If no Time Patroller spawns or you do not get a Key Item (Dragon Ball), retry the map.

PQ 12 is really great, because the first room has no combat and the Time Patroller spawns in front of you at the start of the match, in a square paved area. Upon creating the game, simply start the mission and boost forward. He will be revealed almost instantly. If not retry. Beating the mission with 10 minutes still on the clock will require you to fight Frieza. Waiting until after the clock passes 10 minutes may be faster depending on your skill.

PQ 02 is also a common place to farm, due to the low level enemies. If you have leveled to a point where you can kill everyone in one or two shots, this mission is the way to go. Just kill the first group, then the Time Patroller may spawn in front of the house.

Currently speculation. Nothing is clear yet.

The most accepted solution is, when a Time Patroller is killed, a random number is chosen, 1 through 7. You are awarded 1 Material Item and the Dragon Ball of the randomly chosen number. If you have said Dragon Ball, you are instead awarded a second Material Item