Jump

Jump was Tobio Tenma's pet dog who was later adopted by Astro. Jump is Astro's loyal pet and sidekick throughout the 1980 anime.

Personality
He is smart for a dog. Jump is receptive to commands, but he has a mind of his own and won't do tricks. He is also fiercely loyal and has put his life on the line to protect Astro and Uran.

Appearance
Jump is a beige Australian Terrier. He has several dark brown spots on his ear, face, and back. He has a brown collar with a round silver ID tag.

1980 manga
Jump appears in several chapters of the Astro Boy Shogaku Ninensei manga miniseries. These were translated into English and appear in volume 23 of the Dark Horse release.

1980 anime
Jump primarily appears in the 1980 anime series. He is introduced in the first episode, where he lives in Tenma Manor with his owners, Dr. Tenma and Tobio. He is always at Tobio's side, until Tobio tells Jump to go home while Tobio drives to the Ministry of Science. Tobio winds up in a fatal car accident, and Jump mourns as hard as Tenma does.When Jump is reintroduced to the rebuilt robotic Tobio, Jump is uncomfortable and growls at Tobio. It takes a long time for Jump to get used to Astro and trust him, but when he does, he goes back to being the boy's loyal dog. Jump was rescued from the Tenma estate by Professor Ochanomizu, who also built Astro's parents and set the family up with a suburban home. Throughout the 1980 series, Jump can be seen with Astro's family at home or out in Metro City.

In the episode "Robot Vikings", Jump is terribly injured while trying to fend off intruders from Astro's house. Much to Uran and Astro's horror, Jump's condition worsens, while the robot vikings are still on the loose. Luckily, Atlas makes a serum to save Jump's life, as thanks for Astro rescuing him. Jump heals completely and keeps living happily with Astro's family.