Inspector Daria (ダリア警部) is a red-headed inspector and a self-proclaimed rival of The Cornstalker. She often sprains her back or foot while making her extravagant entrance poses and gets motion sickness when travelling.
Cornstalker or Phantom Sorghum (怪盗モロコシ Kaitou Morokoshi) He is a master of disguise that is always trying to steal the rarest and most valuable items in the world.
Connor or KIMI is a young polite man that recently moved to town and opened the antique shop Old Time. He often gives Mackenzie information on antiques, and sometimes gives her useful items. His shop seems to be closed quite often.
Miss Yvonne is a famous Noodle Chute designer and owner the clothing boutique Naked Bones.
Mayor Tom or Town Mayor (町長) is the mildly corrupt and cowardly mayor of Osawari. He always panics or faints if anything happens to his items,
Jack (ジャック), also known as Jack the Devil, is the conductor of Train 19. . He hates freeloaders and will throw the freeloader out of the train, even if it is still in movement.
Eric, a train passenger in room C2, his job is to deliver an important item from Wallaby's Auction House to the winning bidder.
Ace (エース), a train passenger in room C3, has a grudge on Jack for ruining a rare ticket he had, and now devotes his life to perfecting the art of freeloading. Friday is his apprentice.
Silver (シルヴァー) is a realistic puppet model created by Lord Sprazer II several years ago. Silver could sing beautifully in the past, but now his singing voice is awful because of a strange incident that happened in the Greenhouse years ago.
KB (ケイビー) is a guard from Wallaby's Auction House and is responsible to protect two briefcases during their delivery.
Granny or Mrs. Goose (グース夫人) is a gentle old woman that lives in a neighboring town. The Cornstalker disguises himself as her, acting nice and giving food to Mackenzie before leaving the Train.
Harrison (ハリソン) is a very loud archeologist and often says he is a very tough guy. He doesn't like Mayor Tom and forms the Tough Guys Club alongside Dover and Friday.
The Fossil Hunter is an ancient person that excavates fossils and is a friend of the Seabottom Dwellers. He can't move if his eye falls.
The Seabottom Dwellers, known (roughly) as the "Seabed People" (海底人) is a group of people that live in a mountain that used to be submersed in the past and are friends of the Fossil Hunter. The Seabottom Dwellers swim around in the Cambrian stratum.
Colleen or Colon (コロン Koron) in Japan, is a ghost girl that runs the Haunted Mansion.
Spooky or Kuro-chan (クロちゃん), is a cat that hangs around the Haunted Mansion
They appear when The Cornstalker combines the artifacts .The Aliens abduct and lock all of them in cells, as punishment for stealing the Seabottom Dwellers's treasure, they say that they will destroy the earthlings's most important thing, cows, leaving them without their precious meat.