Misused: Spinoff Babies

In particular, the Anime and Manga section. Lots of examples use "characters are in SD/chibi" rather than the focal point of the thread wherein the original cast are reimagined as children. Hell more often than not, SD/chibi characters AREN'T children, but the same ol' adults with comical proportions.

• The Adventures of Mini-Goddess is taken from the fact that the Goddesses in Ah! My Goddess have the ability to divide into Fun Size multiples of themselves (great for catching wayward spirits).
• DD Fist of the North Star is a chibified Fist of the North Star where Kenshiro and company live on a peaceful Earth where the nuclear apocalypse never happened.
• Dragon Ball:
  • The whole manga get a colored Super-Deformed spin-off, called Dragon Ball SD.
• Kamen Rider SD, a joke OVA that depicted horrifically adorable, super-deformed versions of the Kamen Riders (from Rider 1 to Black RX). In retrospect, it deliberately makes Den-O look like Black.
  • Speaking of Den-O, there was also Imagin Anime, which had chibified versions of the Taros Brothers having all sorts of misadventures.
• Petit Eva, a Lighter and Softer adaptation of Neon Genesis Evangelion.
• SD Gundam Force is the closest you're going to get with to this trope with Humongous Mecha.

And this one isn't even a spinoff babies

• Soar High! Isami is a variation: it focuses on the high school-aged descendants of the Shinsengumi, the special police force organized by the Bakufu military government during Japan's Bakumatsu period in the 1800's to protect the shogunate representatives, with officers pulled from Tokyo's sword schools.