Just a question, why is Armaldo in UU? He's got the same attack as Pinsir (btw, only 3 pokemon have an attack stat higher than 125, two of them don't know the meaning of the word movepool (Glaceon and Flareon) and the other one is Kingler) and doesn't have a piece of crap SpD. He gets STAB on X-Scissor and Stone Edge, gets Rock Polish, Swords Dance, Rock Blast, Earthquake, Aerial ace, Cross poison, Brick break, Iron tail (for what they're worth) and SR. Although he only resists Normal and Poison, he doesn't have any glaring 4x weaknesses, his actual weaknesses are Rock, Water and Steel (Rock and water ain't nice, but who cares about steel).
He also has a useable special attack (70; same as crobat), not great, but useable if you really want (too bad he doesn't get any useable special attacks besides HP, Flash Cannon, Ancient Power, Hyper beam and Water pulse). His only main problem is his speed (which still beats out Gastrodon, Bastiodon, Macargo, Probopass, Quagsire, and equals a whole heap of other pokemon).
Here's a list of pokemon that outspeed him and get stab on one of it's weaknesses in UU;
Aggron
Bibarel x
Blastoise
Cloyster x
Crawdaunt x
Dewgong x
Golduck x
Gorebyss x
Huntail x
Kabutops
Kingler x
Lanturn
Lapras
Lumineon x
Luvdisc x
Mawile
Omastar x
Phione x
Probopass
Politoad x
Poliwrath
Quilfish
Relicanth x
Sharpedo
Wailord x
Walrein
Whiscash x
Now let's take out all the pokemon very rarely used (marked with crosses, although this may come under fire). That leaves;
Aggron
Blastoise
Kabutops
Lanturn
Lapras
Mawile
Poliwrath
Probopass
Quilfish
Sharpedo
Walrein
There's only three of them there that aren't weak to stone edge or earthquake; Blastoise, Sharpedo and Poliwrath (who, unfortunately for Armaldo, resists both stabs). Most Poliwrath sets are 3HKO'd by unboosted EQ (possible 2HKO with Choice band, definite with SR), Sharpedo dies to everything, especially X-Scissor and Blastoise with Max def/HP is 2HKOed by unboosted Stone Edge and SR (assuming Max attack and nature Armaldo, which you should unless your going support). There's very little that likes taking one of his STABs, and although he's got 40 (yes 40) less base speed than Pinsir, he has 75/100/80 for defenses; pretty bulky for UU. With choice band, Swords danced up, or with trick room support, very little is getting past Armaldo (specially if you use Aerial Ace, considering how common fighters are in UU).