Dark Tuner Monsters (ダークチューナーモンスター (sometimes formatted as
Much like their "parent" Type, as well as Pendulum Monsters and Base Monsters, Dark Tuner Monsters are primarily a secondary Type of Effect Monsters, but they can also be a secondary Type of Normal Monsters. Like normal Tuners, there are cards that can treat non-Dark Tuner Monsters as Dark Tuners, including themselves, meaning Dark Tuning, like regular Tuning, is NOT considered an effect, and cannot be negated with cards such as " ".
Due to their inverse Summon mechanic, Dark Tuner Monsters are usually high in Level, as opposed to normal Tuners being low in Level, as more Levels would be needed for the subtraction process. There are low-Level Dark Tuners, but they are not recommended for use unless you use support cards that can change non-Tuner monster Levels to Negative Levels (such as "").
In Yu-Gi-Oh! 5D's and some fan works, Dark Tuner Monsters act as a subcategory of Tuner Monsters and can thus be affected by cards that affect regular Tuners.
Some fan works, however, remove this ruling completely, making Dark Tuner Monsters a completely stand-alone secondary Type that requires its own support.
All Dark Tuner Monsters in 5D's and related works are also part of an Archetype, also called "Dark Tuner" (