Spoiler alert: The following section contains plot-specific details.(Skip Section)
The episode starts with Kirby playing with Tuff and his friends, where they kick a can and Kirby has to get it. After Tiff sees him fall off a cliff and roll into a tree, she tells off the others for bullying Kirby and they leave. She thinks it would be best to give Kirby a friend for his own.
Meanwhile, Gengu is frantically searching for a toy to present to Tiff's family, who is visiting. He notices a strange box which has the Nightmare logo on it, but is interrupted as Tiff and Tuff arrive. When Lady Like sees Tuff playing with a toy plane, she scolds him and reminds him that they were here for Kirby's toy, not his. Tuff replies that he knows, and accidentally breaks the toy. Gengu then walks over and presents them the toy and decide to get it for Kirby.
After they come home, they decide to open the box and see what it was. It is revealed to be a robotic toy dog. Tiff then reads the instruction manual, which says to pull the dog's tail after putting in the batteries. It seemed to adore the pink Star Warrior the milisecond it has been activated. Kirby, however, runs away as it chases him. Soon everyone wants one, even King Dedede, and goes to extreme measures to get it. Tiff soon discovers its danger to others and tries to get Kirby away from it. By this point, Kirby and the Robotic Puppy have become closely attached, but doesn't know it because it only attacks in self-defense or for Kirby. Kirby stands on the tip of a cliff which gives way, dropping him and the Robotic Puppy into the ocean. Dedede rides his boat, still trying to get the Robotic Puppy. The Robotic Puppy enters self-destruct mode as Kirby swims to it. It has flashbacks of the times it had with Kirby, and sheds a tear before pushing Kirby away and jumps into Dedede's net, to Kirby's shock. Shortly after, it explodes and its tail lands in Kirby's hands. Later at night, Kirby watches the ocean and Gengu arrives to give him his own version of the Robotic Puppy as a plush. He admits it'll never replace the original, but Tiff reassures him that Kirby would understand. Then an image of the Robotic Puppy appears in the sky as a constellation, reaching for Kirby before running off into the distance. At the ends, Kirby jumps up and yells as if to say goodbye, leaving Tiff and Gengu with confused faces.
End of spoilers
Changes in the dub
The book that Tiff is reading has the English title "The Crest and the Mark" digitally airbrushed out.
Just as Robot Pet wakes up and his screen turns on, the scenes that show the English and Japanese writing on Robot Pet's screen was cut out.
The scene where Kirby and his Robot Pet are skipping though the grass and flowers are shown was cut in the English Dub for unknown reasons but was shown in Kirby Takes the Cake.