Daddy Long Leg:
Anger Point Raises Atk to +6 if struck by a critical hit.
~ It seems like a very unstable poke. Let's see what happens when he snaps.
Anticipation Alerts the Pokémon of certain dangerous moves.
~ Appears to be very ancy(?).
Frisk Shows the foe's item.
~ already been said
Hustle Physical moves do 50% more damage at the cost of 20% Accuracy. Increases wild encounter rate with higher level Pokémon.
~This one seems to fit along with tangled feet
Skill Link Multi-hit move will always hit for the maximum amount.
~ Lots of hands. Lots of hits.
Soundproof Unaffected by sound moves.
~ Lots of hands. Lots of ear plugs.
Suction Cups Cannot be forced to switch. Increases chance of encountering Pokémon while fishing.
~ ... Lots of hands. Moar suction(?).
Tangled Feet Evasion increases when confused.
~ Lots of erm... FeetHands.. Faeds.
Unaware Ignores stat boosts on all Pokémon.
~ he certianlly looks to busy to care.
Unburden Speed increases when an item is used or lost.
~ Well, this one really makes sense. Not so much for the support aspect but when he drops his apple thats 1 less hand to worry about. amiright?
My fav top 3:
Frisk
Hustle
Tangled Feet