Consider the following:

In Gen 7, Game Freak adjusts the mechanics behind Ground types, Flying types, and Pokemon with Levitate. Rather than Levitators having a separate ability, Pokemon which would logically levitate will have this ability ingrained into them, whether they be former Levitators or those who never got the Ability. Pokemon who would now be innate Levitators:
-All current Levitators except Gengar (seriously, has this nigga ever taken his feet off the ground in a single one of his sprites or models- if Duskull loses his Levitate on evolution, so does Haunter)
-Beedrill
-The Magnetite family
-Dustox
-Castform
-Glalie
-Froslass
-The Vanilluxe family
-The Klingklang family

Current Levitators, if in possession of a second Ability, will use that one as its actual Ability, in addition to the innate Levitate. Levitators without a second Ability gain the follow ones:

Azelf/Mesprit/Uxie: Cursed Body
Baltoy/Claydol: Regenerator
Carnivine: Chlorophyll
Chingling/Chimecho: Soundproof
Cresselia: Natural Cure
Cryogonal: Refridgerate
Tynamo/Eeletrik/Eelektross: Lightningrod
Vibrava/Flygon: Tinted Lens
Giratina-O: Intimidate
Hydreigon: Intimidate
Koffing/Weezing: Regenerator
Latis: Run Away
Lunatone: Dry Skin
Solrock: Solar Power (how does it not get this already)
Misdreavus/Mismagius: Magician (come the fuck on)
Rotoms of various forms: Lightningrod
Unown: who cares

In exchange for this buff, all Levitators and Flying types can now be struck, Flying types for NVE damage, by "ranged" Ground moves. These would include:
-Bonemerang
-Earth Power
-HP Ground

Thoughts?