Mysterious Joker

Episode Synopsis The phantom thief Joker plans on stealing the Dragon Gem, which is located inside the Kaneari mansion. While infiltrating the mansion, he meets a clumsy ninja Hachi, who is after the treasure as well since it belongs to his village. Hachi, amazed by Joker's tricks, begs Joker let him be Joker's apprentice.

Joker and his new apprentice, Hachi, travel to Paris in order to steal the Recollection of Napoleon, which is hidden inside a 100-year safe that only opens up every 100 years. However, they have to deal with a detective, who does everything he can to prevent the thieves from stealing the painting.

Joker and Hachi sneak inside Kaneari's private luxury cruise in order to steal the Mermaid's Crystal. They end up coming across Joker's rival Spade, also known as King, and his assistant, Dark Eye. The group join forces to steal the treasure, though Joker and Spade keep grudging against each other.

Joker plans on stealing the Ice Sculpture of Odin, which is on display on the 88th floor on a skyscraper known as the Valhalla Tower. Later, he and Hachi discover that Spade and Dark Eye are after the treasure as well, and he and Spade compete with each other to steal the treasure first.

While cleaning Joker's room, Hachi discovers a key that belonged to Joker's father. The episode then flashbacks to Joker's childhood when his father challenged him to find the key that was hidden somewhere in the family mansion.

Joker is framed for performing robberies at art museums around the world, however, he doesn't remember doing any of it. The robberies were actually performed by a rival phantom thief Shadow Joker, who looks a lot like Joker.

Blue sea! White clouds! A tropical island! Joker and Hachi are after a gem called the Scarlet Heart, which legends say once belonged to the island's great king. There's an old stone tablet in the village with a riddle that will lead to the treasure.

The treasures Joker goes after are being destroyed one after another. Joker and Hachi are afraid that their next target, the Silver Egg of the Russian Tsar, might be destroyed as well, so decide to try to beat the culprit to the punch.

Oniyama and his team used the fake Silver Egg to fool the thieves while they loaded the real one onto a plane. Queen disguises herself as a passenger to get on board and destroy the Silver Egg. Meanwhile, the injured Silver Heart tells Joker that Queen has mistaken him for the man who killed her parents, and asks him to clear up the misunderstanding.

Joker and Hachi infiltrate Kaneari's private Golden Express that is meant to transport a historical family treasure over to the Kaneari Museum in Paris. However, stealing the treasure won't be an easy task since Kaneari and Oniyama do everything they can to prevent the thieves from stealing it.

Taking place in a flashback during Joker, Spade, and Queen's childhood, a mutant dog known as Super Dog #101 was created in a laboratory and escapes along with a mutant lizard who wants to destroy the human race.

Joker and Hachi sneak into the castle of the Koga Ninja to steal the Golden Shachihoko from the roof of their great hall.

A series of underground Grecian ruins plays host to the Treasure of Olympus. Hachi and Roko are forced to charge into the ruins after Spade to keep him from beating them to the treasure.