Invent an Ability

How about these?
Drakinate- do i need to explain? the normal-turned-Dragon moves can damage fairy types, but only for half damage
Gale Fists- Gale Wings with Fighting type moves
Repellion- If the Pokémon is at the head of your party, Repels last twice as long
Immense Power- the Pokémon has x4 attack
Greedy- The Pokémon gets you 5x more cash after battle

 

I would say these

Dodger- 20% to evade an attack. Does not affect 100% change moves
Quick heal- Pokémon heals 1/16 of HP every turn.
Cunning- Raises sp. att if affected by a status condition (poison, Paralyze, burn) (Guts for sp attack)

 

Here's a couple ideas I had

Escape Artist: the Pokémon will take extra damage from trap hazards, but removes them at the same time

Trap Resilient: The Pokémon takes less damage from trap hazards.

 

Dire Stand - When the Pokémon's HP falls below 25%, all of this Pokémon's hits have 100% chance of being critical hits.
Thick Fog - A layer of fog covers the field. All Pokémon on the field have their accuracy lowered by 10%. Pokémon with this ability are immune.
Infectious - Passes on Paralysis, Burn or Poison to an opponent when coming into contact while removing the status from the Pokémon.

 

Slick- this Pokémon may not be affected by moves that damage over time (Wrap, Fire Spin)

Honed- accuracy for all moves is upped by 10%

 

Reversion: This ability will reverse any damage done by moves that are Super Effective for one turn, but will not activate if the Pokémon faints due to the super effective damage.