Unknown

Unknown is a race of creature shared between each of the 5 civilizations.

It initially only featured only on multicolored cards.

Nomenclature
The names of the Unknowns in Episode 1 all refer to fictitious or real-world espionage personalities.

Unknown creatures originally featured the Kanji of 偽りの名 (Itsuwari no Na), which means "False Name". コードネーム (Kodonemu) is written in katakana above this text, meaning Codename.

DMR-06 and DMX-11 added multiple new naming procedures for Unknown creatures.
 * Light creatures with the Angel Command race have 真実の名 (Shinjitsu no Na) meaning "Truth Name".
 * Above it, トゥルーネーム (To~urūnēmu) or "Truename" is written.
 * Many of them also contain レオ (Leo) and オレ (Ore).
 * Light creatures with the Demon Command race have 偽りの羅刹 (Itsuwari no Rasetsu) meaning "False Evil Spirit".
 * Above it, コードファイト (Kōdofaito) or "Codefight" is written.
 * Light evolution creatures with the Demon Command race have 偽りの羅刹 (Itsuwari no Akuma Kami) meaning "False Devil God".
 * Above it, コードデーモン (Kōdodēmon) or "Codedemon" is written.
 * Darkness creatures with the Angel Command race have 偽りの星 (Itsuwari no Hoshi) meaning "False Star".
 * Above it, コードナイト (Kōdonaito) or "Codenight" is written.
 * Fire creatures with the King Command Dragon race have 偽りの王 (Kōdokingu) meaning "False King".
 * Above it, コードキング (Kōdokingu) or "Codeking" is written.
 * Fire creatures with the Armored Dragon race include ラゴン (Ragon) in their card name.
 * Nature creatures with the Wild Veggies race have 偽りの大菜王　(Itsuwari no dai saiō) meaning "False Large Vegetable King".
 * Above it, コードベジタブル (Kōdobejitaburu) or "Codevegetable" is written.

Gameplay
They later featured on cards in all of the civilizations as well as on Zero Civilization creatures.

They appear to be a third faction in the war between the Hunters and Aliens.

Unknown creatures have a race dedicated to helping them, the Unnoise.