Notes on Legendary Pokémon's abilities

Winged Mirages:

1. Pressure/Snow Cloak: Articuno
2. Pressure/Static: Zapdos
3. Pressure/Flame Body: Moltres

Mew duo:

1. Pressure/Unnerve/(Steadfast)/(Insomnia): Mewtwo
2. Synchronize: Mew

 Legendary Beasts:

1. Pressure/Inner Focus

Tower Duo:

1. Pressure/Multiscale
2. Pressure/Regenerator

Celebi: Natural Cure
Lati Twins: Levitate

Regis:

1. Regirock: Clear Body/Sturdy
2. Regice: Clear Body/Ice Body
3. Registeel: Clear Body/Light Metal
4. Regigigas: Slow Start

Weather Trio:

1. Rayquaza: Air Lock/(Delta Stream)
2. Groudon: Drought/(Desolate Land)
3. Kyogre: Drizzle/(Primordial Sea)

Deoxys: Pressure
Jirachi: Serene Grace
Legendary Pixies: Levitate
Creation Trio: Pressure/Telepathy
Giratina Origin Forme: Levitate
Shaymin Land Forme: Natural Cure
Shaymin Sky Forme: Serene Grace
Heatran: Flash Fire/Flame Body

Dream duo:

1. Darkrai: Bad Dream
2. Cresselia: Levitate

Arceus: Multitype
Victini: Victory Star

Kami trio:

1. Prankster/Defiant/(Volt Absorb)
2. Prankster/Defiant/(Regenerator)
3. Sand Force/Sheer Force/(Intimidate)

Tao trio:

1. Teravolt
2. Turboblaze
3. Pressure/(Teravolt)/(Turboblaze)

Swords of Justice: Justified
Genesect: Download
Meloetta: Serene Grace
Hoopa: Magician

Cosmog-line:

1. Unaware
2. Sturdy
3. Full Metal Body
4. Shadow Shield

Necrozma: Prism Armor
Tapus: Surges/Telepathy
Marshadow: Technician
Magearna: Soul-Heart
Volcanion: Water Absorb
Phione/Manaphy: Hydration

Pseudo-legendary abilities that are not used:

1. Sap Sipper
2. Goomy
3. Shell Armor
4. Bulletproof
5. Soundproof
6. Hustle
7. Shed Skin
8. Rock Head
9. Rough Skin
10. Sand Veil
11. Overcoat
12. (Aerialite)
13. (Tough Claws)
14. Sand Stream
15. Guts
16. Marvel Scale