They are represented by the symbol , which is the color inverse of the usual positive Level symbol. On a card, the Negative Level Stars align to the left, whereas positive Level Stars align to the right.
When Dark Synchro Monsters were released in the OCG/TCG, they were all changed to regular Synchro Monsters with their levels changed to the usual positive.
- Contrary to what might be expected, the Tag Force video games seem to treat negative Levels identically to positive Levels in some ways. For example, it is possible to use a Level 5 monster(s) and a Level -5 monster(s) as Xyz Materials to Xyz Summon a Rank 5 Xyz Monster.
- ↑ "Yu-Gi-Oh! Tag Force 6 Dark Synchro Xyz vs Vizor | YouTube". October 13, 2011. http://www.youtube.com/watch?v=pWEPnravn7E&t=3m7s. Retrieved May 30, 2017.