Sirius: Gadget Dog From 24th Century

Sirius: Gadget Dog From The 24th Century, also known in Japan as Sirius (シリウス), is a Japanese children's picture book series written by and illustrated by Ryo Tetsuno and is the second spin-off of Marc Brown's Arthur series (the first was Postcards from Buster). The book was first published from December 2023 to October 2034. The story is set in an alternate universe in the Arthur series and revolves around a tailess robotic dog named Sirius, who travels back in time from the 24th century to aid Arthur and his family.

The book series spawned a media franchise. An anime TV series have been adapted by NHK Educational, NEC Interchannel and AEON Studios of Japan. in 2024. Additionally, Ashi Productions has produced over three animated films. Various types of merchandise and media have been developed, including soundtrack albums, video games, and musicals. The book series was licensed for an English language release in North America, via Amazon Kindle, by a collaboration of Testuno Pro with PBS Kids. The anime series was licensed by both PBS Kids and Genesis Entertainment for an English-language release in North America in 2024, and LUK International in Europe, the Middle East and Africa.

Sirius was well-received by critics and became a hit in many Asian countries. It is also one of the highest-grossing media franchises of all time, of which the animated film series has the highest number of admissions in Japan and NHK Educational TV. The Sirius character has been viewed as both a Japanese and American cultural icon, and was appointed as the first "anime ambassador" in 2039 by the country's Foreign Ministry.

Synopsis
The series sets the same as the original Arthur TV series. However, a robot dog from the 24th century named Sirius is sent back to the past by Arthur's future grandchild, Joey Read, to keep an eye on Arthur and his sister D.W. so that their descendants can have a better control on their lives. Sirius has a four-dimensional pouch in which he stores tools, inventions, and gadgets from the future to aid Arthur and friends whenever they're faced with a problem. Although Sirius is a dog robot, he has a fear of cats because of an incident where a robotic cat cuts off his tail. This is why Sirius lost his original yellow color and turned purple, from sadness.

Other main characters featured in the series beside Sirius are Arthur Read, D.W., Buster Baxter (Athur's best friend), Alan Powers (common nickname "Brain"), Binky Barnes, Rattles, Muffy Crosswire, Francine Frensky, and George Lundgren. Although Binky and Rattles are Arthur friends, they also typically bully and abuse him. Arthur normally responds by using Sirius's gadgets to fight back against them, but Arthur has a tendency to get carried away with using the gadgets (or Binky and Rattles, if they steal it away), which typically results in unintended consequences for him and others.

In addition to he main characters, Adhara, Nova and Sue Ellen are also recurring characters. Adhara is Sirius's younger sister, and Nova is a robot cat whose species had a rivaly over robot dogs in the future. The series finale reveals that the show is just a dream by Arthur.