Alpha-sapphire: 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.Y: Shaped like ancient writing, it is a huge mystery whether language or Unown came first.X: Its flat, thin body is always stuck on walls. Its shape appears to have some meaning.
Prof. Lotus' Notes: In the original Silver and Gold games, because of limitations to the hardware, Unown letters were generated by using the IV values. Because of this calculation, only the letters I and V could be shiny.