Simple Dragon Dance set
![](https://play.pokemonshowdown.com/sprites/ani/rayquaza-mega.gif)
AG Creator (Rayquaza-Mega) @ Life Orb
Ability: Delta Stream
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Extreme Speed
- Dragon Ascent
- V-create
- Dragon Dance
Dragon Ascent is needed to Mega-Evolve. Extreme Speed is priority and targets faster Pokemon. V-Create melts Ice-type along with Necrozma-Dusk Mane. Dragon Dance is set-up, and at +1, only the bulkiest Pokemon in this whole world can take its hit. Adamant is chosen over Jolly since you already outsped a lot of things after a +1 Dragon Dance. Life Orb is chosen, and for other weird choices would be Lum Berry (Lol) and other things.
BUT FOR THE FUTURE OF THIS WORLD DON'T USE SASH RAY!
![image](https://cdn.discordapp.com/attachments/749922324131610684/803146609943642136/4fxqx1.jpg)
Calculations
At +1 Atk, without Life Orb, see your damage input against Ho-Oh.
- +1 252+ Atk Rayquaza-Mega Dragon Ascent vs. 248 HP / 208+ Def Ho-Oh: 331-391 (79.7 - 94.2%) -- guaranteed 2HKO
Now, you shall see yourself getting a burn from Sacred Fire or Whirlwind-ed back while Ho-Oh gets that HP back from Regenerator.
AND if you held Life Orb, it surely would have been a KO.
- +1 252+ Atk Life Orb Rayquaza-Mega Dragon Ascent vs. 248 HP / 208+ Def Ho-Oh: 430-508 (103.6 - 122.4%) -- guaranteed OHKO
Now, VS opposing M-Ray.
- 252+ Atk Rayquaza-Mega Dragon Ascent vs. 0 HP / 4 Def Rayquaza-Mega: 274-324 (78 - 92.3%) -- guaranteed 2HKO
You don't get the KO without Life Orb. On the other hand;
- 252+ Atk Life Orb Rayquaza-Mega Dragon Ascent vs. 0 HP / 4 Def Rayquaza-Mega: 356-421 (101.4 - 119.9%) -- guaranteed OHKO
VS Yveltal
- 252+ Atk Rayquaza-Mega Dragon Ascent vs. 0 HP / 0 Def Yveltal: 288-339 (73.2 - 86.2%) -- guaranteed 2HKO
While if you had Life Orb;
- 252+ Atk Life Orb Rayquaza-Mega Dragon Ascent vs. 0 HP / 0 Def Yveltal: 374-441 (95.1 - 112.2%) -- 68.8% chance to OHKO
This explains why Life Orb is possibly the best item on it. Using Focus Sash on it is totally bad; it doesn't get a lot of important KOes where it would have done. As such, there arises no reason to use Focus Sash.
Thanks for reading.