Defeat the Bully (ガキ大将をやっつけろ Gakitaishō wo Yattsukero) is an episode from the Doraemon 1973 anime.
"What's yours is mine and what's mine is mine."
The bully Gian has stolen the manga and toys of the neighborhood's children. Everyone wants it back, and Doraemon takes the Instant Object Mobile, that brings objects from everywhere to your location. Nobita brings the manga back but Doraemon starts to take every object from Gian's house, including his own father. Actually, Gian's family is only composed of him and his father. So, for Gian his father isn't replaceable as toys and manga, and he started to cry. Doraemon, when he saw it, brought Gian instantly with his father. Gian returned everything again. It was just a generic brat bully.