
http://www.serebii.net/pokedex-dp/306.shtml
I don't think a thread has ever been made for this UU monster. Then again, I'm only a lurker around here. Anyway, on to business.
Types: Rock/Steel
Abililities: Rock Head (no recoil) and Sturdy (OHKO moves don't work)
Weaknesses: Water, Fighting (x4), Ground (x4)
Resistances: Normal (x4), Ice, Flying (x4), Psychic, Bug, Rock, Ghost, Dragon, Dark
Immunities: Poison
Physical:
Iron Head
Iron Tail
Double-Edge
Focus Punch
Dragon Claw
Earthquake
Return
Brick Break
Aerial Ace
Facade
Fling
Shadow Claw
Giga Impact
Stone Edge
Avalanche
Rock Slide
Endeavor
Body Slam
Dragon Rush
Metal Burst
Counter
Ice Punch (Emerald)
Thunderpunch (Emerald)
Firepunch (Emerald)
Impressive. Most notable addition is 150 BP Stone Edge. 80% accuracy bites, but hey, critical hits are good.
Special:
Ice Beam
Blizzard
Solar Beam
Thunderbolt
Thunder
Flamethrower
Fire Blast
Focus Blast
Dragon Pulse
Dark Pulse
Flash Cannon
Surf
Look, ma, I can surf.
Support:
Iron Defense
Roar
Protect
Metal Sound
Toxic
Taunt
Sandstorm
Rest
Endure
Rock Polish
Thunderwave
Stealth Rock
Sleep Talk
Swagger
Substitute
Curse
Screech
Not bad. Rock Polish and Curse are cool, but not necessarily groundbreaking.
Aggron always suffered from three of the most common attack types: Water, Fighting and Ground. I don't think the physical/special split really benefitted the steel dinosaur, with Waterfall, Land Power and Focus Bomb becoming used among the masses. To put it simply, Rhyperior, Metagross and Tyranitar beat it pretty badly in the OU metagame. If only it had a cool ability like its OU brethren.
Still, it has its advantages over some of them and with its huge movepool it could be a force in UU. It didn't change all that much, really. Resists Slaking like none other. Resists Max CB Guts'd Megahorn leaving 60% to spare with max HP and Defense, though Close Combat obviously destroys it. Resists most birds now with Hidden Power out of the equation.
Aggron @Leftovers
Stone Edge
Focus Punch
Substitute
Thunderwave
Standard set. Beats up Curslax without EQ and cripples non-Swamperts among things.
Aggron @Choice Band
Stone Edge
Focus Punch
Earthquake
Aerial Ace/Ice Punch/Thunderpunch/Fire Punch
CBzilla. Aerial Ace for Heracross, Ice Punch for dragons and Gliscor, Thunderpunch for Gyarados, Fire Punch for, um, nothing notable I guess.
Aggron @Leftovers
Rock Slide
Iron Head
Thunderwave
Earthquake
Paraflinching lol. 30% ain't bad with T-wave support. EQ is for Steels.
Not sure how the UU metagame will unfold, but it probably has a place somewhere. Hey, it could be worse, it could be Bastiodon.