| Pokedex Entries: |
| Gold | Their shapes look like hieroglyphs on ancient tablets. It is said that the two are somehow related. |
| Silver | Its flat, thin body is always stuck on walls. Its shape appears to have some meaning. |
| Crystal | Because different types of UNOWN exist, it is said that they must have a variety of abilities. |
| Ruby | This POKéMON is shaped like ancient writing. It is a mystery as to which came first, the ancient writings or the various UNOWN. Research into this topic is ongoing but nothing is known. |
| Sapphire |
| Emerald | This POKéMON is shaped like ancient text characters. Although research is ongoing, it is a mystery as to which came first, the ancient writings or the various UNOWN. |
| FireRed | Its flat, thin body is always stuck on walls. Its shape appears to have some meaning. |
| LeafGreen | Their shapes look like hieroglyphs on ancient tablets. It is said that the two are somehow related. |
| Pearl | They seem to communicate among each other telepathically. They are always found stuck on walls. |
| Diamond | Shaped like ancient writing, it is a huge mystery whether language or UNOWN came first. |
| Stadium 2 | Their shapes look like hieroglyphs on ancient tablets. It is said that the two are somehow related. |
