Why Freeze-Dry if it's a physical attacker?
While Freeze-Dry isn't necessary, it's actually neat to have simply because it lets Mega Glalie hit bulky Water Pokemon, like Wash Rotom, for super effective damage. It also hits Ludicolo, Mega Swampert, Quagsire and regular Gyarados 4x as super effectively:
4 SpA Glalie Freeze-Dry vs. 252 HP / 0 SpD Rotom-W: 168-200 (55.2 - 65.7%) -- guaranteed 2HKO after Leftovers recovery
4 SpA Glalie Freeze-Dry vs. 0 HP / 0 SpD Gyarados: 360-424 (108.7 - 128%) -- guaranteed OHKO
4 SpA Glalie Freeze-Dry vs. 252 HP / 4 SpD Quagsire: 504-592 (127.9 - 150.2%) -- guaranteed OHKO
4 SpA Glalie Freeze-Dry vs. 104 HP / 0 SpD Mega Swampert: 328-388 (89.3 - 105.7%) -- 31.3% chance to OHKO
Could someone suggest me a good moveset for regular Rayquaza? Most sets I've seen have V-create, but I can't get hold of that move, since it's event only. Any help on what I could use?
V-create isn't necessary on Rayquaza anymore because Dragon Ascent is its new nuking attack. Both deal the same amount of damage. While Dragon Ascent still lowers Rayquaza's defenses, it doesn't lower its Speed. Earthquake, Fire Blast and Overheat still let it deal with Steel Pokemon. Despite its name, Dragon Ascent is a Flying move instead of a Dragon move:
-Draco Meteor
-Dragon Ascent
-Earthquake/Fire Blast
-Extreme Speed/Earthquake
Nature: Naive
EVs: 252 Atk/40 SAtk/216 Spe
Item: Life Orb
or
-Swords Dance
-Dragon Ascent
-Earthquake
-Extreme Speed/Dragon Dance
Nature: Jolly/Adamant
EVs: 252 Atk/4 SDef/252 Spe
Item: Life Orb
Move 1: Swords Dance
Move 2: Earthquake / Iron Head
Move 3: Dragon Claw / Outrage
Move 4: Extreme Speed
Since V-create is an "anti-steel" type attack in Rayquaza's movepool, Earthquake is a good substitute for it. You can easily outmatch most of the Ice / Steel / Poison type attackers although you might experience some difficulty if the opponent has the Levitate ability.
On the other hand, you can also use Iron Head with 30% chance to flinch if you feel like gambling your way through the match.
As I mentioned above, Dragon Ascent is Rayquaza's new nuking attack, and it does more damage to Fairies than Iron Head would:
252 Atk Life Orb Rayquaza Dragon Ascent vs. 104 HP / 32 Def Xerneas: 286-337 (68.2 - 80.4%) -- guaranteed 2HKO
252 Atk Life Orb Rayquaza Iron Head vs. 104 HP / 32 Def Xerneas: 255-302 (60.8 - 72%) -- guaranteed 2HKO
And even though Mega Rayquaza is banned to "anything goes", Dragon Ascent isn't. In Ubers play (yes, it's a tier now), regular Rayquaza can still have Dragon Ascent, but it can't Mega Evolve.
Edit: Greninja'd by a long shot, but I still feel like giving better explanations.