Aggron is a monster! There's lots of things it can do...
No-Recoil Abuse-
Ability: Rock Head
Head Smash
Double-Edge
Earthquake
Aqua Tail/Iron Head/Iron Tail
Weight Gain-
Ability: Heavy Metal (DW ability)
Heavy Bomber
Stone Edge
Earthquake
Iron Head/Iron Tail
Stealth Rock Abuse-
Ability: Rock Head
Stealth Rock
Dragon Tail
Head Smash
Earthquake
Paralysis-
Ability: Rock Head
Thunder Wave
Head Smash
Earthquake
Double-Edge/Aqua Tail
Purge Sweeper-
Ability: Rock Head
Body Purge
Head Smash
Earthquake
Double-Edge/Iron Head/Iron Tail
Curser-
Ability: Rock Head
Curse
Head Smash
Earthquake
Double-Edge/Aqua Tail
Other interesting options: Metal Burst, Dragon Claw, Dragon Rush, Superpower, Rock Slide, Payback, Knock Down, Hone Claws, Iron Defense, Toxic