| Onii Kingdom | |
|---|---|
 The entrance to the Onii Kingdom | |
| Ruler | Onii King |
| Princess | Princess Apricot |
| Regions | Dark Valley Onii Grounds |
The Onii Kingdom is the first kingdom that Corobo explored. It is ruled by Onii King. Various Oniis inhabit the Onii Kingdom. To the southwest is the Sunflower Plains.
Little King's Story Soundtrack--Dark Valley Skull Plains