Quoted By:
ITT; fix abilities to make them acceptable, not amazing
Magician - Attacks do double damage if they steal an item (can be powered by gems, so Flamethrower+fire gem, then steal item)
Protean - only changes type once. Can be reset if switched out. Doesn't count if user attempts to change into their current type (so Greninja wont waste its use on using Water Shuriken or Pursuit)
Damp - Also prevents damage from Rough Skin, Iron Barbs and Rocky Helmet and negates Destiny Bond for both pokemon involved.