It's an ability that increases Accuracy of moves by 30%. It also has an out-of-battle effect that happens when a Pokmon with it is at the head of your party...it increases the chance of finding wild Pokmon holding an item. Whether or not you can obtain all of these in the game is all up to you.
CRD. Type:Abbreviation. Definitions 1. Abbreviation for chronic respiratory disease.
BID, also b.i.d. or BD, is a medical abbreviation for bis in die, meaning to give medication twice a day. TID, also t.i.d., is a medical abbreviation for ter in die, meaning to give medication three times a day. QID also q.i.d, is a medical abbreviation which means to give the medication four times a day. PRN is a medical abbreviation for pro re nata, meaning to give medication as the situation demands or according to need. Qxh or Qxd once every x hours or once every x days. More abbreviations here. Notes at the link above offer a good formula for calculating changing the number of times a day dosing.