In Gen 5, hidden abilities (at the time, they were known as Dream World abilities because the Pokemon came from the now-defunct Dream World service) were introduced, but not every Dream World ability was released. It was assumed that every Dream World ability would get released, so in anticipation for this, every single one was made legal for the format, as well as datamined Pokemon like Keldeo and Genesect that were in BW1 but hadn't been released. Because the format revolved around information from BW1, the Therian formes, Kyurem-Black, and the BW2 move tutor moves were never added as a part of the format (so for instance, Poison Heal + Stealth Rock Gliscor never existed in this format). There were also minimal bans in this format (it includes Pokemon like Deoxys-Speed that are currently banned from OU), so the tier was a lot more aggressive than BW OU is.Also what is DW OU?
According to the dex page, it lost interest after BW2 released.
Also, Chandelure has Shadow Tag.
















or the mini sprites 

















