I know the easy way to finish the job. Once Lucario maxes at Lv.100 (currently halfway to 99), I'm swapping Ditto in and playing with it to give it a further XP boost. After that, I will let it watch me fight Audino and Chansey (quicker since Transform requires a second turn for an attack). Shouldn't take too long. I have a five Heart Venusaur from trade that got through about three or four levels (now 73 or 74) with only 25 attacks.