You have a Trick Room section, but no Choice Band Aggron. C'est tres mal.
Aggron @ Choice Band
Trait: Rock Head
EV's: 252 HP / 252 Atk / 4 Def
0 Speed IVs
Brave Nature
-Head Smash
-Heavy Slam
-Earthquake
-Fire Punch / Aqua Tail / Superpower
Under the effects of Trick Room, the raw power bestowed in Aggron's STAB Head Smash reaches phenomenal levels. It's stupidly strong, cleanly 2HKOing standard Gligar. Heavy Slam also allows Aggron to bypass certain checks that resist Head Smash, such as the innumerate Fighting-types (bar Cobalion) found in the Underused tier. Earthquake hits any Grounded Steel-type for super-effective damage, rounding off coverage with Head Smash. Fire Punch may be used to nab things like Bronzong, while Aqua Tail hits Ground-types for super effective damage. Superpower is Aggron's strongest move against Empoleon and most other Steel-types in the tier, but using it will force Aggron to switch out, wasting a turn of Trick Room.