Cobalion was never actually banned. UU stole it from us >.> I want to say the same happened with Gligar, but I"m not 100% sure on that one
Kind of sad that Meloetta didn't make it on here. Felt like it was good in the 8th-10th area. Cobalion being 6th is a perfect spot for it and Moltres was just stupid broken. That said, 11th and 12th are easily Tyrantrum and Meloetta. They're the only two mons left that could have rightfully been in the top 10. Duggy is an easy 13th. Inconsistency keeps it from being top 10, but when it was good, oooh was it good. Virizion should probably make 14th considering it was RU from the start. Similar issues to Dugtrio, but it's been a bit more consistent in exchange for not being outright ridiculous at certain points. Flygon 15th, Venusaur 16th, Diancie and Medicham rounding it out at 17th and 18th. None were RU at all (iirc at least) in XY, although they've been quite good in ORAS.