Foe lowering:
Icy Wind(speed)
Rock Tomb(speed)
Low Sweep(speed)
Mud Shot(speed)
Mud Slap(accuracy)
Glaciate(speed)
Acid Spray(Sp.Def)
Bulldoze(speed)
Electroweb(speed)
Mystical Fire(Sp.Atk)
Snarl(Sp.Atk)
Struggle Bug(Sp.Atk)
Self lowering:
V-create(defense, sp.def, speed)
Psycho Boost(sp.atk)
Leaf Storm(sp.atk)
Overheat(sp.atk)
Draco Meteor(sp.atk)
Superpower(attack, defense)
Close Combat(defense, sp.def)
Hammer Arm(speed)
Ice Hammer(speed)
Hope I helped!