Hospitality
When the Pokémon enters a battle, it showers its ally with hospitality, restoring a small amount of the ally's HP.
Basically, when Sinistcha / Poltchageist enters the battle with this ability, it will heal your Pokemon a bit. This ability very likely will only work in Double Battles.
Mind's Eye
The Pokémon ignores changes to opponents' evasiveness, its accuracy can't be lowered, and it can hit Ghost types with Normal- and Fighting-type moves.
You can't miss, and you also have the effects of Scrappy.
Toxic Chain
Toxic Chain may cause bad poisoning when the Pokémon hits an opponent with a move.
Apparently it wasn't what I thought it would be. There's already two abilities that poison the target on contact!
Supersweet Syrup
A sickly sweet scent spreads across the field the first time the Pokémon enters a battle, lowering the evasiveness of opposing Pokémon.
This ability lowers the evasiveness of all Pokémon on the field. However, this is only the first time Dipplin enters the battle. It might be like some sort of entry hazard, but it's 1% likely that would happen, because that would be hella OP.
Embody Aspect
Embody Aspect boosts a particular stat, depending on the form of Ogrepon:
- Teal Mask form: the Pokémon's Speed stat is boosted.
- Heartflame Mask form: the Pokémon's Attack stat is boosted.
- Wellspring Mask form: the Pokémon's Sp. Def stat is boosted.
- Cornerstone Mask form: the Pokémon's Defense stat is boosted.
This ability can only be used by Ogrepon. So this probably means it can't be Skill Swapped, like Mimikyu's Disguise.