In many works of fiction, there comes a time when a character will be walking along when, suddenly, they see a cardboard box on the side of the road. Inside said box is inevitably an abandoned Cute Kitten or Precious Puppy, left by an irresponsible pet owner, just begging to be taken home. For some reason, they never seem to leave the box even if the cats, especially, could jump out easily. A kind passerby will react with sympathy for the abandoned animals and may even adopt them; more callous characters will ignore them or mistreat them outright. The animals themselves may or may not get adopted; luckier ones find their forever homes on the sidewalk while less fortunate puppies and kittens may often have to go through further hardships before finding their happy endings. A popular method of introducing a Loyal Animal Companion. Sister trope to From Stray to Pet and Doorstop Baby. See also Girl in a Box, which uses boxes to introduce a likely major character.
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Anime and Manga
- In one episode of Doraemon, Doraemon helps Nobita secretly care for a box of puppies/kittens. After some time travel and thought process acceleration, the two returned to find that the dogs and cats became humanoid, gained the ability to talk, and built a sophisticated civilization with high technology. Apparently, the now-humanoid dogs and cats have decided to leave the Earth to another planet because they've predicted that the Earth will be facing a world-wide disaster.
- Massugu ni Ikou: In episode 4, Mametarou and Hanako come across a puppy in a box. They end up acting as Parental Substitutes until it is taken home by a girl.
- Sakamoto from Nichijou. Nano has no choice but to leave him behind when he first finds the cat in a box, only to find him again at home courtesy of the professor.
- Kicks off the plot of Nukoduke. In the first chapter, Yuuya found Kei and Sasame abandoned in a box on the street, and decided to adopt them.
- In the "Go West Young Meowth" episode of Pokémon, it's shown that Meowth was abandoned as a kitten in a nest. He grew up on the streets with no parents, gang, or trainer.
- This is the backstory for a Dex-Starr/Dexter, a cat that joins the Red Lanterns in Green Lantern. Dexter & his siblings are shown in a box labelled "FREE" on the day of Dexter's adoption. When his adopted owner is killed in a home invasion, Dexter is thrown into the street and nearly drowned by two thugs who throw him into the river - at which point he is recruited into the Red Lanterns and becomes Dex-Starr.
Film - Animated
- In the sequel to Balto, Balto and Jenna's puppies are given away in a box. One of them however doesn't get adopted because her looks betray her wolf-dog heritage.
- Inverted in Mr. Peabody & Sherman; the canine Peabody found the human Sherman as a baby inside a cardboard box in an alley.
- Oliver & Company opens with a box full of kittens being sold on a Manhattan sidewalk. All the kittens are sold except for one - our hero, Oliver - who is callously left in the box on the rain.
- In Rio, Blu the macaw was discovered by Linda in a box on the side of the road.
- In the first book of the All American Pups series, New Pup on the Block, the others meet Rosie when her box is tossed out of a moving car.
- Sphynx the cat from A Certain Magical Index was left in a box◊ and adopted by Index.
- Played for Laughs in My Teen Romantic Comedy SNAFU. A little kitty is left in a box to get Saki Kawasaki's attention, but failed. Instead, Yukino Yukinoshita drops her coldness to stay in front of the box meowing with the kitty.
Film - Live Action
- This is Riley's backstory in Homeward Bound II: Lost in San Francisco. The boy he was bought as a present for didn't want him, so the parents left Riley in the gutter. Unlike many examples, Riley is not adopted by a kind passerby; he becomes a street dog with a deep distrust of humans.
- The children mobile game Little Kitten - My Favourite Cat is about a kitten abandoned in a box that gets into a house and is adopted, the game is about to pet and play with the kitty (called as Crumbs) in an interactive house.
- In We Bare Bears, when the bears are still cubs, they try to find a family by sitting in a cardboard box with "Free Bears" written on it.
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