Tuner monsters (Japanese: チューナー Chūnā, "Tuner") are monsters with "Tuner" listed on the Type/Ability line. They are required for the Synchro Summon of a Synchro Monster. Normal, Fusion, Effect, Pendulum, and Synchro Monsters themselves can all be Tuner monsters, although some card effects can treat non-Tuner monsters as Tuners. Flip and Union monsters and Special Summon Monsters can also be Tuner monsters. A number of support cards specifically deal with Tuner monsters, including "Mind Trust", "Boost Warrior" and "Quillbolt Hedgehog", which can further aid in setting up a Synchro Summon.