>Open PC
>Select search feature
>Search for ability
>You get a list of every ability in the game

Here's the new ones I spotted

Bulletproof: Protects the Pokémon from some ball and bomb moves.
Gale Wings: Gives priority to Flying-type moves.
Gooey: Contact with the Pokémon lowers the attacker's Speed stat
Grass Pelt: Boosts the Defense stat in Grassy Terrain
Magician: The Pokémon steals the held item of a Pokémon it hits with a move.
Symbiosis: The Pokémon can pass an item to an ally.

Gooey's gotta be Goodra's hidden ability. Same for Grass Pelt/Gogoat. No idea about the others though.

Gale Wings could be ridiculous, so I'd say it's gotta be a mega, but who?