UPDATE: I thought of a few new abilities and moves to put in this list, but I'm gonna put them up here so the new ones don't get lost in between all the old ideas :)
New Abilities:
Faithless - Fairy type damage is negated
Final Wish - Upon fainting, its stat changes are copied by the next Pokemon sent out on its own team
Grace Period - No other Pokemon on the field can use a direct damage dealing move until this Pokemon uses one (it wouldn't work if this Pokemon doesn't carry any damage dealing moves)
Habituation - Moves deal 25% less damage every use after the first on this Pokemon
Medium - Copies the stat changes of a teammate that fa