What if Levitate got removed?

Inspired by Zarel's Gen-Next proposal, I decided to do my take on the idea of intrinsic Ground immunity replacing Levitate. Unlike Zarel's more modest proposal, I'm actually going full way with this, with giving all Levitate users full three abilities, and Legendaries one ability and one HA.

Gastly-Haunter-Gengar:
New Main Abilities: Cursed Body, Insomnia
New Hidden Ability: Shadow Tag

Koffing-Weezing:
New Main Abilities: Aftermath, Stench
New Hidden Ability: Flare Boost

Misdreavus-Mismagius:
New Main Abilities: Cursed Body, Insomnia
New Hidden Ability: Magic Bounce

Unown:
New Main Abilities: Telepathy, Synchronize
New Hidden Ability: Protean

Vibrava-Flygon:
Based on Trapinch's Hyper Cutter, Arena Trap, Sheer Force
New Main Abilities: Tinted Lens, Arena Trap
New Hidden Ability: Sheer Force

Lunatone-Solrock:
New Main Abilities: Synchronize, Magic Guard,
New Hidden Ability(Solrock): Drought
New Hidden Ability(Lunatone): Snow Warning

Baltoy-Claydol:
New Main Ability: Magic Guard, Synchronize
New Hidden Ability: Magic Bounce

Duskull:
New Main Ability:  Pressure

Chimecho- Chingling:
New Main Abilities: Synchronize, Magic Guard
New Hidden Ability: Healer

Latias-Latios:
New Main Ability: Synchronize
New Hidden Ability: Telepathy
New Mega Ability: Magic Bounce

Bronzor-Bronzong:
New Main Ability: Clear Body

Carnivine:
New Main Abilities: Leaf Guard, Chlorophyll
New Hidden Ability: Gluttony

Rotom:
New Main Abilities: Motor Drive, Static
New Hidden Ability: Lightningrod

Uxie-Azelf-Mesprit:
New Main Ability: Synchronize
New Hidden Ability(Uxie): Forewarn(JP. Name Prophetic Dream)
New Hidden Ability(Mesprit): Telepathy
New Hidden Ability(Azelf): Inner Focus (JP. Name: Force of Will)

Giratina Origin Forme:
Based off regular Giratina;
New Main Ability: Pressure
New Hidden Ability: Telepathy

Cresselia:
New Main Ability: Synchronize
New Hidden Ability: Magic Bounce

Tynamo-Eelektross-Eelektrik:
New Main Abilities: Static, Volt Absorb
New Hidden Ability: Swift Swim

Cryogonal:
New Main Abilities: Ice Body, Clear Body
New Hidden Ability: Snow Warning

Hydreigon:
New Main Ability: Moxie

Though I must say that I'm surprised with the fact that they didn't announce any new Pokémon with Levitate, besides the Lati duo. I wouldn't be surprised if the Flygon Mega ends up phasing out Levitate for something else like Gengar did.

Note(17.02.2018): Gengar no longer has Levitate, instead has Cursed Body.
Note (02.01.2020): Koffing and Weezing now both have full three Abilities in addition to Levitate.