Unown

Unown (アンノーン Unknown) is a -type Pokémon introduced in Generation II.

Physical Appearance
Unown is a hieroglyph Pokémon. There are Unowns for each letter of the English alphabet, as well as exclamation points and question marks (as of Generation IV). Unowns are shaped like its letter, except it has an eye somewhere in the letter.

Trivia

 * The name "Unown" is based on the word "Unknown."
 * It is widely known as one of the most "Non evolving" Pokémon ever made.
 * If you look closely all its form look like the alphabetical order from A to Z plus the exclaimation and question marks.
 * the punctuation marks have droopy eyes while the letters have normal eyes