Pickup??? I don´t really know what that move is.
I thought Close Combat was the most overpowered attack in the game, it always ends up killing my Pokémon, (I do not have a specific Pokémon that can resist fighting type, nearly all flying types have a normal half, wich removes the fighting resistance) I consider Close Combat overpowered since it only Decreases 2 of your stats instead of sharply decreasing one, and having your stats decreased doesn´t matter since you will most likeley, defeat the enemy in one hit.
...Pickup is an ABILITY, not an attack.
It randomly gets things after battle, if it's not holding anything.
It rarely gets some REALLY good things, and what it can get becomes better as they level up.