Osomatsu-kun (1988)

An animated adaptation of the comedy manga series "Osomatsu-kun" (1962-1969) by Fujio Akatsuka. The nominal protagonist is Osomatsu Matsuno, the eldest brother among the Matsuno sextuplets. The six brothers are identical-looking 10-year-old troublemakers, but they have different character traits. They often have disagreements. The main cast includes the Francophile con-artist Iyami, the local bully Chibita (who likes animals, but mostly dislikes humans), and the pretty girl Totoko (the shared love interest of all 6 brothers).