Dark Synchro Monsters (Japanese: ダークシンクロモンスター Dāku Shinkuro Monsutā) are a type of Monster Card exclusive to the anime, manga, and Tag Force video games. They are a counterpart to Synchro Monsters, having Negative Levels (in the anime and video games) that are represented by blue orbs with purple stars, or are Level 0 (in the manga). The color of their card frame is dark grey. These cards are placed in the Extra Deck. Dark Synchro Monsters debuted in episode 27 of Yu-Gi-Oh! 5D's. They are also present in the Yu-Gi-Oh! 5D's manga and the video games Yu-Gi-Oh! 5D's Tag Force 4, 5, and 6.