Elite Four Sidney
Mightyena - Swords Dance, Earthquake. Only kill mightyena once at +3, X Speed turn 2 if no Swagger turn 1, SD turn 3 if still no Swagger turn 2. 
Always X Speed with 89 Speed or lower at Level 46
Shiftry - (X Speed (if no swagger turn 1) Earthquake
Absol - Earthquake
Cacturne - Earthquake  (Rock Tomb)
Sharpedo - Earthquake

Heal and give Persim.

Elite Four Phoebe
Dusclops - Swords Dance, Earthquake
Dusknoir- Precipice Blades (Earthquake with god attack)
Sableye - Earthquake
Banette - Heal if cursed, Earthquake
Banette - Earthquake

Equip Red Orb for Glacia, Elixir and heal.

Elite Four Glacia
Glalie - X Speed, Swords Dance, Earthquake
Skip the X Speed with 99 Speed or higher at Level 45
Froslass - Earthquake
Froslass - Earthquake
Walrein - Earthquake
Glalie - Earthquake (Rock Tomb if protect)

Remove Red Orb, Full Restore if needed.

Elite Four Drake
Altaria - Swords Dance, Rock Tomb (SD again if Cotton Guard or <11 atk IV (144 or less at 45)
Kingdra - Earthquake
Flygon - Swords Dance, X Speed, Strength (Skip speed with 106+ at 46)
Flygon - Strength
Salamence - Rock Tomb