From the Super Mario Wiki
The title of this article is official, but it comes from a non-English source. If an official name from an English source is found, the article should be moved to its appropriate title.
Unibō (ウニボー), from "uni" or "sea urchin", are spiky round enemies that inhabit flying and swimming areas. Unibō are nearly indestructible; in Super Mario Land 2: 6 Golden Coins, they can be defeated by only a Star or Koopa Shell. They remain stationary until Mario comes near, at which point they will shake on the spot to make themselves harder to avoid. They reappear in Mario & Wario, slightly redesigned to look more like Urchins and their visible eyes removed (although they could be facing away from the screen). In addition, they now come in two varieties: those with blue bodies move vertically, and those with yellow bodies move horizontally. In addition, they no longer sleep and are contantly moving around.
A Gordo, which looks similar to a Unibō
The original appearance of Unibō is very similar to both Gordo from the Kirby series and Sea Urchins from the Zelda series.
- ^ Mario to Wario instruction booklet, page 11.