Episode 1 - Episode 1

There's a candy thief at large and Butt Detective's on the case with Brown as his backup. But the trail of the culprit leads right into a lake.

Episode 2 - Episode 2

Butt Detective goes to the station, where the officers are looking into who's behind a string of burglaries. But the chief has another job for them.

Episode 3 - Episode 3

After a Kaito the canine crook threatens to steal the Goddess Scarf from the museum, Butt Detective prepares to protect the precious booty.

Episode 4 - Episode 4

The Black Shadow thieves are in town and the police ask Butt Detective for assistance in putting an end to their mischief before any theft occurs.

Episode 5 - Episode 5

Butt Detective, Brown and Chief Maltese must get to the bottom of the Black Shadow Gang's burglaries. Later, they search for the leader's hideout.

Episode 6 - Episode 6

After someone leaves a strange box at the Lucky Cat, the police show up to help only to find they're behind Butt Detective, who's already on the case.

Episode 7 - Episode 7

A conversation at a feline cafe leads Butt Detective to reveal the backstory of how Brown became his assistant, going back to how he learned to talk.

Episode 8 - Episode 8

A potato-loving lady clad in purple knocks on Butt Detective's door and asks him to get to the bottom of a mysterious message from her ancestors.

Episode 9 - Episode 9

The purple potato case continues as Butt Detective, Brown and their purple companion head into the ancestors' hut. But it appears to be empty.

Episode 10 - Episode 10

While hearing about a forest cafe's missing manager, Butt Detective realizes he's been tailed by a persistent koala who may be after Brown's job.

Episode 11 - Episode 11

When the local barbershop owner complains of a spooky ghost scaring his customers, Butt Detective volunteers to get to the bottom of the mystery.

Episode 12 - Episode 12

Butt Detective is asked to protect the Oyagi family treasure from Kaito U, a master of disguise, but he seems to remain one step behind the thief.

Episode 13 - Episode 13

Master burglar Kaito U's stolen the booty from right under Butt Detective's cheeks. But our perceptive hero is not far behind the thief.

Episode 14 - Episode 14

Butt Detective gets a mysterious letter from a faraway jungle, but it's missing a return address on its back. He and Brown head out for an adventure.

Episode 15 - Episode 15

Butt Detective and Brown venture further into the dangerous ruins only to come face-to-face— or rather cheek-to-cheek—with a familiar figure.

Episode 16 - Episode 16

Butt Detective is expecting to be interviewed by Cafe Guide magazine, but the odd interviewer who arrives doesn't quite pass the sniff test.

Episode 17 - Episode 17

Just as Butt Detective is about to go to the police station to learn about a new crime-fighting tool, he receives an urgent call about a stolen item.

Episode 18 - Episode 18

An international crime-fighting organization has discovered Kaito U's hiding place. Before they head in, Butt Detective is brought along as backup.

Episode 19 - Episode 19

Butt Detective and Brown resolve to get to the bottom of rumors about a giant thief. They soon deduce what appears to be its present location.

Episode 20 - Episode 20

While the cops continue their investigation into the giant jewel thief, Butt Detective and Brown are hot on the heels (and cheeks) of the big bandit.

Episode 21 - Episode 21

Brown reports that while Butt Detective was out, someone stole his precious snack. The big-cheeked detective uses the case as a training opportunity.

Episode 22 - Episode 22

Koala-chan asks Butt Detective for help dealing with ghosts seen near a park she likes. Brown insists he's not scared but doesn't seem to want to go.

Episode 23 - Episode 23

Butt Detective, Brown and Koala-chan are trapped behind a locked door in the supposedly-haunted mansion but he soon deduces an alternate egress.

Episode 24 - Episode 24

After getting his cheeks shaved, Butt Detective accepts a job from the police to return a stolen item to its owner. But no one knows who it is.

Episode 25 - Episode 25

Butt Detective investigates a robbery at the Elvis Grizzly museum. The case darkens as the clues lead back to one of the police's own K-9 officers.

Episode 26 - Episode 26

When a missing bag turns back up filled with cash, Butt Detective must reconstruct a series of unintentional exchanges before two lovebirds depart.

Episode 27 - Episode 27

A wealthy banker whose daughter has been kidnapped calls on Butt Detective. The criminal is demanding his famous Rainbow Diamond, but it's missing.

Episode 28 - Episode 28

Butt Detective's search for the Rainbow Diamond is almost at an end. But some wall-writings indicate that actually picking it up might not be so easy.

Episode 29 - Episode 29

Kaito U's back and he's threatening to steal a porcine spa's "greatest treasure." Butt Detective and the K-9s try to deduce what it could be.

Episode 30 - Episode 30

Butt Detective and Brown head to a local festival, where a troublemaker who looks just like the double-cheeked detective has been making mischief.

Episode 31 - Episode 31

Butt Detective uses the cards and coin that his doppelganger left behind to locate him. Meanwhile, Brown helps his new female friend find her ribbon.

Episode 32 - Episode 32

A new investigator claims to be the best and challenges Butt Detective to a public detective match. But our hero senses something amiss.

Episode 33 - Episode 33

There's trouble at the KNK bank and the police ask Butt Detective to take the job. But soon Carrot Horse butts in, complicating the situation.

Episode 34 - Episode 34

Butt Detective receives another request from rich banker Kamenokoji. His daughter Midori is up to something odd and he wants the sleuth to tail her.

Episode 35 - Episode 35

The K-9 cops and a gang of sparrow laborers ask Butt Detective to look into what's behind a series of spooky ghost-sightings at an old clock tower.

Episode 36 - Episode 36

After feline thieves nab a special cane, Butt Detective is on the case. He's joined by his double-cheeked dad, who has a history with the stolen item.

Episode 37 - Episode 37

Brown and his koala pal star in a new detective movie. But behind the scenes, Butt Detective must solve a real case involving some thieving monkeys.

Episode 38 - Episode 38

Butt Detective arrives at Castle Wolf to protect its booty from Kaito U. But he gets the impression there's something not quite right with his host.

Episode 39 - Episode 39

Butt Detective arrives at the treasure only to see it stolen by Kaito U. But then a second Kaito U appears and each claims that the other is a phony.

Episode 40 - Episode 40

Butt Detective and Brown head to a ski slope to investigate rumors of a monstrous yeti, who is behind the resort’s sudden drop in customers.

Episode 41 - Episode 41

Butt Detective's deductions finally lead him to the bottom of the yeti mystery. But he still needs to catch the culprits responsible for its creation.

Episode 42 - Episode 42

Butt Detective's deductions finally lead him to the bottom of the yeti mystery. But he still needs to catch the culprits responsible for its creation.

Episode 43 - Episode 43

Chief Maltese butts heads with his rival, Chief Chihuahua, at a restaurant. After something goes missing, they compete to see who can solve the case.

Episode 44 - Episode 44

Butt Detective uses tricky tactics to give Brown a lesson in sleuthing. Later, the local kids surprise Brown by giving him a case of his own to solve.

Episode 45 - Episode 45

Butt Detective and Brown receive a mysterious visitor. Once they deduce his identity, he asks them to help stop Kaito U from stealing his treasure.

Episode 46 - Episode 46

Butt Detective and the contestants face their next trial: a giant, menacing snake. Later, Kaito U finally shows himself and tries to steal the veil.

Episode 47 - Episode 47

Kaito U enters the infamously inescapable Orinona Prison and its straight-arrow warden vows to reform him. But Kaito U isn't about to change his ways.

Episode 48 - Episode 48

Kaito U and his crow companion escape from their prison cell, but they're not out of danger yet. Their first stop is the guards' break room.

Episode 49 - Episode 49

While Butt Detective and the canine cops review a string of apple thefts, a journalist bursts in to report his camera was stolen by a spooky culprit.

Episode 50 - Episode 50

After two painful cavities lead Brown and Koala-chan to meet at the dentist's office, a canine detective asks them to find his 11 missing puppies.

Episode 51 - Episode 51

The canine cops reveal a new crime-fighting invention that they're very proud of. But it reminds Brown of the destruction caused by their last one.

Episode 52 - Episode 52

Kaito U is going after the opera house's treasure, so Butt Detective and Brown pay a visit. One of the actors they see on stage is awfully familiar.

Episode 53 - Episode 53

Episode 54 - Episode 54

Episode 55 - Episode 55

Episode 56 - Episode 56

Episode 57 - Episode 57

Episode 58 - Episode 58

Episode 59 - Episode 59

Episode 60 - Episode 60

Episode 61 - Episode 61

Episode 62 - Episode 62

Episode 63 - Episode 63

Episode 64 - Episode 64

Episode 65 - Episode 65

Episode 66 - Episode 66

Episode 67 - Episode 67

Episode 68 - Episode 68

Episode 69 - Episode 69

Episode 70 - Episode 70

Episode 71 - Episode 71

Episode 72 - Episode 72

Episode 73 - Episode 73

Episode 74 - Episode 74

Episode 75 - Episode 75

Episode 76 - Episode 76

Episode 77 - Episode 77

Episode 78 - Episode 78

Episode 79 - Episode 79

Episode 80 - Episode 80

Episode 81 - Episode 81

Episode 82 - Episode 82

Episode 83 - Episode 83

Episode 84 - Episode 84

Episode 85 - Episode 85

Episode 86 - Episode 86

Episode 87 - Episode 87

Episode 88 - Episode 88

Episode 89 - Episode 89

Episode 90 - Episode 90

Episode 91 - Episode 91

Episode 92 - Episode 92

Episode 93 - Episode 93

Episode 94 - Episode 94

Episode 95 - Episode 95

Episode 96 - Episode 96

Episode 97 - Episode 97

Episode 98 - Episode 98

Episode 99 - Episode 99

Episode 100 - Episode 100

Episode 101 - Episode 101