Episode 1
E1
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
E2
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
E3
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
E4
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
E5
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
E6
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
E7
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
E8
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
E9
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
E10
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
E11
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
E12
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
E13
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
E14
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
E15
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
E16
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
E17
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
E18
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
E19
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
E20
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
E21
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
E22
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
E23
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
E24
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
E25
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
E26
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
E27
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
E28
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
E29
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
E30
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
E31
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
E32
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
E33
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
E34
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
E35
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
E36
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
E37
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
E38
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
E39
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
E40
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
E41
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
E42
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
E43
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
E44
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
E45
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
E46
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
E47
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
E48
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
E49
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
E50
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
E51
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
E52
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
E53
Episode 54
E54
Episode 55
E55
Episode 56
E56
Episode 57
E57
Episode 58
E58
Episode 59
E59
Episode 60
E60
Episode 61
E61
Episode 62
E62
Episode 63
E63
Episode 64
E64
Episode 65
E65
Episode 66
E66
Episode 67
E67
Episode 68
E68
Episode 69
E69
Episode 70
E70
Episode 71
E71
Episode 72
E72
Episode 73
E73
Episode 74
E74
Episode 75
E75
Episode 76
E76
Episode 77
E77
Episode 78
E78
Episode 79
E79
Episode 80
E80
Episode 81
E81
Episode 82
E82
Episode 83
E83
Episode 84
E84
Episode 85
E85
Episode 86
E86
Episode 87
E87
Episode 88
E88
Episode 89
E89
Episode 90
E90
Episode 91
E91
Episode 92
E92
Episode 93
E93
Episode 94
E94
Episode 95
E95
Episode 96
E96
Episode 97
E97
Episode 98
E98
Episode 99
E99
Episode 100
E100
Episode 101
E101
Episode 102
E102
Episode 103
E103
Episode 104
E104
Episode 105
E105
Episode 106
E106
Episode 107
E107
Episode 108
E108
Episode 109
E109
Episode 110
E110
Episode 111
E111
Episode 112
E112
Episode 113
E113
Episode 114
E114
Episode 115
E115
Episode 116
E116