quickest way to fill your Protectomon:
1) Hire a hero who has a unit with Scavenger (increased chance to find loot)
2) Give that hero either Energy or Poison attack to make things easier
3) Do the Great Hydra quest
4) Only place the units with Scavenger on the map (can only place 4 units anyway)
5) Upgrade the units to have Scavenger fully upgraded first
6) Complete the quest in about 2-3 minutes tops
7) Repeat steps 3-6 and your Protectomon should be complete within 2-4 times of doing the quest
 "summit"){kind=icon}
 "Idle Food Truck"){kind=icon}
 "Royal Offense"){kind=icon}
 "Alien Anarchy"){kind=icon}
 "Epic Battle Fantasy 4"){kind=icon}
 "Flakboy 2"){kind=icon}
 "Protector IV"){kind=icon}
 "Arcuz - Behind the Dark"){kind=icon}
 "Take Something Literally"){kind=icon}
 "Vox Populi, Vox Dei(a werewolf thriller)"){kind=icon}
 "Robot Dinosaurs That Shoot Beams When They Roar"){kind=icon}
 "ISIS (challenge edition)"){kind=icon}
 "Multitask"){kind=icon}
 "Shopping Street"){kind=icon}
 "Box Clever"){kind=icon}
 "Fantastic Contraption"){kind=icon}
 "Sonny 2"){kind=icon}