Gontron1

I think adding in Gen 6 Pokemon and type changes aren't bad ideas at all, as most of the severe balance issues in Gen 6's meta were related to megas (which is not being requested). Fairy typing will give Hydriegon and Garchomp solid counters and give steel/poison type moves more of a reason to exist. Really, the only problematic Pokemon I can see would be Aegislash (Greninja could also be an issue, but with the current lack of hidden abilities I doubt he'll be the uber monster he was).